Wyniki wyszukiwania

1

New species of oribatid mites of the families Parakalummidae and Galumnidae (Acari: Oribatida) from Xiao Hinggan Mountains, Northeastern China

100%

Liu D., Wu D.

Annales Zoologici

|

2013

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tom 63

|

nr 2

Two new species of oribatid mites, Sandenia (Porokalumma) elongata sp. nov. (Parakalummidae) and Pergalumna distincta sp. nov. (Galumnidae), are described and illustrated from Xiao Hinggan Mountains in Northeastern China.

2

Descriptions of two new species of Austrophthiracarus Balogh et Mahunka, a newly recorded genus of ptyctimous mites from China (Acari: Oribatida: Phthiracaridae)

100%

Liu D., Chen J.

Annales Zoologici

|

2014

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tom 64

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nr 2

The oribatid mite genus Austrophthiracarus Balogh et Mahunka (Phthiracaridae) is recorded for the first time from China. Two new species of Austrophthiracarus are described: A. filiformis sp. nov. and A. longisetosus sp. nov. Their morphological descriptions and illustrations are given.

3

Descriptions of two new species of the family Oribotritiidae (Acari: Oribatida: Euphthiracaroidea)

81%

Liu D., Niedbala W., Stary J.

Annales Zoologici

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2011

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tom 61

|

nr 4

Two new species of the family Oribotritiidae, Mesotritia solhoyi sp. nov. from Tibet, China and Oribotritia krivolutskyi sp. nov. from Azerbaijan, are described and illustrated. Mesotritia solhoyi is distinguished from the related species by the presence of one pair of anal setae, three pairs of adanal setae, and 8-10 pairs of long genital setae; weakly fusiform head of sensilli; rostral and lamellar setae situated at the same level. Oribotritia krivolutskyi is similar to O. submolesta, but differs by different number of lateral carinae; much longer aggenital setae; longer sensilli, interlamellar and lamellar setae; shorter notogastral setae; setae ps₂ and ps₃ thick and rigid; setae ad₂ placed more close to ad₃ than to setae ad₁; slightly different shape of sensilli.

4

Cadmium accumulation and its effects on growth and gas exchange in four populus cultivars

81%

Gu J., Qi L., Jiang W., Liu D.

Acta Biologica Cracoviensia. Series Botanica

|

2007

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tom 49

|

nr 2

7-14

5

Expression analysis and functional characterization of a cold-responsive gene COR15A from Arabidopsis thaliana

81%

Liu D., Li W., Cheng J., Hou L.

Acta Physiologiae Plantarum

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2014

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tom 36

|

nr 09

The cold-responsive (COR) genes play an important role in cold acclimation of higher plants. Here, a tight correlation between chloroplast functionality and COR15A expression, and the functional characterization of Arabidopsis COR15A involved in salt/osmotic stress, were revealed. COR15A gene is light inducible and expressed in light-grown seedlings. The expression level of COR15A was reduced when chloroplasts were damaged by norflurazon treatment. By using several albino mutants, seca1, secy1, and tic20, all of which exhibited severe defects in both structure and function of chloroplast, it was shown that the accumulation of COR15A mRNA depends on chloroplast functionality. Real-time RT-PCR and GUS-staining assays demonstrated that COR15A was induced by salt/osmotic stress partially via ABA. Overexpression of COR15A in Arabidopsis resulted in the seedlings displaying hypersensitivity to salt/osmotic stress. All these results suggest that plant acquire the ability to fully express COR15A only after the development of functional chloroplasts, COR15A may be involved in response to salt/ osmotic stress during early stages of plant development.

6

Nutrient resorption and use efficiency at different canopy heights of Alpine tree species Abies georgei var. smithii [Viguie et Gaussen] Cheng, Tibetan Plateau

81%

Li M., Liu D., Kong G.

Polish Journal of Ecology

|

2009

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tom 57

|

nr 1

63-72

Nutrients may be mobilized from senescing leaves and transported to other plant tissues, enabling plants to conserve them and reuse. Nitrogen and phosphorus are two dominant nutrients related to photosynthetic capacity and limiting plant growth. In this study, we examined the effect of canopy height on nutrient use by analyzing N and P concentrations of green and senescent leaves collected from different canopy heights of Abies georgei var. smithii (Viguie et Gaussen) Cheng growing at the alpine timberline in Sergyemla Mt. (4 350 m a.s.l), southeastern Tibetan Plateau. The results showed that N and P concentrations per unit needle mass decreased significantly with needle age, but no significant difference was found among upper, middle and lower canopy. However, area-based N and P concentrations increased with the height of canopy. The leaf level nutrient resorption and use efficiency varied in the order: upper canopy> middle canopy >lower canopy for both N and P. The higher nutrient resorption efficiency had significant relationship with leaf level nutrient use efficiency, that is, higher leaf level nutrient use efficiency was partly due to the high resorption from senescent needles. Additionally, the higher nutrient resorption was related to high current nutrient concentration. Vertical variations of leaf level nutrient use efficiency in this study reflected the strategy of alpine trees to respond to imbalance between light availability and soil nutrients.

7

Taxonomic study of the genus Maerkelotritia Hammer, 1967 (Acari: Oribatida: Oribotritiidae) from China, with description of a new species

81%

Liu D., Niedbala W., Chen J.

Annales Zoologici

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2009

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tom 59

|

nr 4

The genus Maerkelotritia is reviewed. Maerkelotritia fusifomtis sp. nov. from litter in temperate forest in Shanxi Province, China, is described, and one newly recorded species, M. krivolutzkii Märkel, 1968, is redescribed. M. kirghizica Niedbała, 2006 is considered as a new junior synonym of M. krivolutzkii. The genus Maerkelotritia is reported for the first time from China.

8

Modelling suitable habitat and ecological characteristics of old trees using DIVA-GIS in Anhui Province, China

81%

Xie C., Yu X., Liu D., Fang Y.

Polish Journal of Environmental Studies

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2020

|

tom 29

|

nr 2

9

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Effects of cadmium stress on root tip cells and some physiological indexes in Allium cepa var. agrogarum L.

81%

Zou J., Yue J., Jiang W., Liu D.

Acta Biologica Cracoviensia. Series Botanica

|

2012

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tom 54

|

nr 1

Allium cepa var. agrogarum L. seedlings grown in nutrient solution were subjected to increasing concentrations of Cd2+ (0, 1, 10, 100 μM). Variation in tolerance to cadmium toxicity was studied based on chromosome aberrations, nucleoli structure and reconstruction of root tip cells, Cd accumulation and mineral metabolism, lipid peroxidation, and changes in the antioxidative defense system (SOD, CAT, POD) in leaves and roots of the seedlings. Cd induced chromosome aberrations including C-mitoses, chromosome bridges, chromosome fragments and chromosome stickiness. Cd induced the production of some particles of argyrophilic proteins scattered in the nuclei and even extruded from the nucleoli into the cytoplasm after a high Cd concentration or prolonged Cd stress, and nucleolar reconstruction was inhibited. In Cd2+-treated Allium cepa var. agrogarum plants the metal was largely restricted to the roots; very little of it was transported to aerial parts. Adding Cd2+ to the nutrient solution affected mineral metabolism. For example, at 100 μM Cd it reduced the levels of Mn, Cu and Zn in roots, bulbs and leaves. Malondialdehyde content in roots and leaves increased with treatment time and increased concentration of Cd. Antioxidant enzymes appear to play a key role in resistance to Cd under stress conditions.

10

Chromium accumulation and its effects on other mineral elements in Amaranthus viridis L.

81%

Zou J., Wang M., Jiang W., Liu D.

Acta Biologica Cracoviensia. Series Botanica

|

2006

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tom 48

|

nr 1

Chromium accumulation and its effects on other mineral elements in Amaranthus viridis L. were investigated using inductively coupled plasma atomic emission spectrometry (ICP-AES) and resin adsorption. The aim was to understand why A. viridis can grow well in soils heavily contaminated by Cr, what the forms of Cr in soils and residues are, and what effects Cr has on the distribution of Mn. Fe, Cu and Zn in the plant. The results indicated that A. viridis is not a hyperaccumulator, although it can grow well in soil containing a high concentration of Cr. The Cr concentration in plant tissues from a contaminated site was about 11 times higher than in those from an uncontaminated site. At both the contaminated and uncontaminated sites, Cr was accumulated primarily in its shoots, and in roots in much lower concentrations. The levels of Cr in A. viridis tissues were as follows: leaf > root > stem. Cr occurred predominantly as Cr(III). There was very little Cr(VI) in the polluted soil where A. viridis grew close to a waste heap discarded by a chromium(VI) production factory. The possible mechanisms for Cr accumulation of A. viridis and the effects of Cr on uptake and accumulation of the other mineral elements in A. viridis are briefly discussed.

11

Effect of Cu2plus concentration on growth, antioxidant enzyme activity and malondialdehyde content in garlic [Allium sativum L.]

71%

Meng Q., Zou J., Zou J., Jiang W., Liu D.

Acta Biologica Cracoviensia. Series Botanica

|

2007

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tom 49

|

nr 1

95-101

The effects of different concentrations (10-5 M, 10-4 M. 10-3 M) of Cu2+ on growth, antioxidant enzyme activity and malondialdehyde (MDA) content were investigated in hydroponically grown Allium sativum L. The results indicated that the growth of garlic seedlings was not inhibited under treatment with 10-5 M Cu2+. Garlic seedlings exposed to 10-4 M and 10-3 M Cu2+ exhibited significant growth reduction. With increasing Cu2+ concentration and treatment time, superoxide dismutase (SOD) activity increased in leaves and roots, and peroxidase (POD) activity increased in leaves. In roots of plants exposed to 10-4 M and 10-3 M Cu2+, POD activity increased within 9 d and then dropped, but was still higher than in the control at the end of the experiment. Catalase (CAT) activity increased in seedlings grown at 10-5 M and l0-4 M, whereas a highly toxic level of Cu2+ (10-3 M) markedly inhibited CAT activity. SOD and POD activity were higher in roots than in leaves, whereas CAT activity was higher in leaves than in roots under both control and Cu2+ treatments. There was no obvious effect on MDA content in the seedlings treated with 10-5 M Cu2+; at 10-4 M and 10-3 M Cu2+ it increased. The mechanisms of Cu2+ toxicity and Cu2+ tolerance in garlic are briefly discussed.

12

Study of the clogging properties of mixed leachate

71%

Xie M., Liu D., Tang Y., Feng M., Yi X.

Polish Journal of Environmental Studies

|

2020

|

tom 29

|

nr 5

13

A synthetic wheat with 56 chromosomes derived from Triticum turgidum and Aegilops tauschii

71%

Zhang L., Liu D., Lan X., Zheng Y., Yan Z.

Journal of Applied Genetics

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2008

|

tom 49

|

nr 1

41-44

By colchicine treatment of hybrids between Triticum turgidum and Aegilops tauschii (as seedlings), a fertile wheat plant (SHW-L2) carrying 56 chromosomes was artificially synthesized. At metaphase I of 50 pollen mother cells, the 56 chromosomes of the new wheat SHW-L2 showed a mean pairing configuration of 2.82 univalents, 6.18 rod bivalents, 19.39 ring bivalents, 0.5 trivalents, and 0.14 quadrivalents. Cytological analyses suggested that SHW-L2 had additional 7 pairs of chromosomes from the A and D genome besides the 42 chromosomes of common wheat. The special chromosome constitution of SHW-L2 may be derived from the chromosome doubling by the colchicine treatment of seedlings and then spontaneous doubling of gametes.

14

Antioxidant response system and chlorophyll fluorescence in chromium [VI] - treated Zea mays L. seedlings

71%

Zou J., Yu K., Zhang Z., Jiang W., Liu D.

Acta Biologica Cracoviensia. Series Botanica

|

2009

|

tom 51

|

nr 1

23-33

The effects of different concentrations of Cr(VI) (1 µM, 10 µM, 100 µM) applied for 7, 14 or 21 days on initiation of high lipid peroxidation level (POL) and consequent changes in the enzymatic-antioxidant protective system and minimization of photosystem II (PSII) activity were studied in maize seedlings. Chromium (VI) caused an increase in the electrical conductivity of the cell membrane, and malondialdehyde (MDA) content (a peroxidation product) reflected peroxidation of membrane lipids leading to the loss of the membrane's selective permeability. It also induced distinct and significant changes in antioxidant enzyme activity. Versus the control, superoxide dismutase (SOD, EC 1.15.1.1.), catalase (CAT, EC 1.11.1.6.) and peroxidase (POD, EC 1.11.1.11.) activity in maize seedling roots and leaves was progressively enhanced by the different Cr(VI) doses and stress periods, except for decreases in SOD and POD activity in leaves exposed to 100 µM Cr(VI) for 21 days. The different Cr(VI) concentrations changed chlorophyll (chl) content differently. The 10 µM and 100 µM doses of Cr(VI) decreased the chl a/b ratio and quenched the chl a fluorescence emission spectra. These effects reflect disturbance of the structure, composition and function of the photosynthetic apparatus as well as PSII activity.

15

Ultrastructural and photosynthetic response of Populus 107 leaves to cadmium stress

71%

Ge W., Jiao Y., Zou J., Jiang W., Liu D.

Polish Journal of Environmental Studies

|

2015

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tom 24

|

nr 2

As Populus 107 is an efficient phytoextraction plant, it was used in the present investigation in order to better understand the mechanisms of detoxification and tolerance of Cd. Cd-induced impacts on photosynthetic parameters (chlorophyll content, soluble protein, and chlorophyll fluorescence) and ultrastructural changes in leaves of Populus 107 exposed to 50 μM, 100 μM, and 500 μM for 40 days were carried out. The results showed that in the Cd-treated cells, almost all the chloroplasts seemed to be affected. Cd induced several significant ultrastructural changes, including swollen chloroplast thylakoids, dissolved thylakoid grana, disintegrated chloroplasts, and numerous plastoglobuli in chloroplasts. Data from chlorophyll fluorescence showed that Fv/Fm, Fv ’/Fm’, ΦPSII, ETR, and qP decreased while qN increased in leaves of Populus 107 exposed to Cd when compared to control. The content of soluble protein increased with increasing Cd concentration and declined with prolonged duration of treatment. The soluble protein content in leaves treated with 50 μM Cd reached the maximum, which was 14.29% more than that of control. The content in leaves exposed to 500 μM Cd were only 61.76% of control. At the end of the experiment the contents of chlorophyll a, b, and a+b of Populus 107 treated with 500 μM Cd decreased to the minimum, which were 47.69%, 37.10%, and 45.49% of control, and respectively, and significantly (P < 0.05) lower than control. The toxic mechanisms of Cd are briefly explained.

16

Histology of tissues and cell wall of rice straw influenced by treatment with different chemicals and rumen degradation

71%

Liu D., Liu J. X., Zhu S. L., Chen X. J., Wu Y. M.

Journal of Animal and Feed Sciences

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2005

|

tom 14

|

nr 2

17

Characterization and functional analysis of a novel PGIP gene from Pyrus pyrifolia Nakai cv Huobali

61%

Liu D., Li W., He X., Ding Y., Chen C., Ge F.

Acta Physiologiae Plantarum

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2013

|

tom 35

|

nr 04

Polygalacturonase-inhibiting proteins (PGIPs) are multifunctional proteins related to plant autoimmunity and belong to the plant extracellular leucine-rich repeat (eLRR) protein superfamily. PGIPs play a role in host defense in many plants. In the present study, a novel PGIP gene, PpPGIP was isolated from Pyrus pyrifolia Nakai cv Huobali. The nucleotide sequence of PpPGIP was highly homologous with PGIPs from other plant species and the protein encoded by PpPGIP has several conserved LRR domains. The putative protein PpPGIP was closely clustered with several PGIPs from horticultural plants on the phylogenetic tree. The constructed homology model of PpPGIP indicated that the main-chain conformation and the folding patterns of PpPGIP were highly similar to structural features of PvPGIP2 from Phaseolus vulgaris. The expression levels of PpPGIP in healthy tissue and organ of ‘Huobali’ were analyzed with RT-PCR, and PpPGIP accumulated a little in young leaves, but PpPGIP was expressed abundantly in the pericarp of ‘Huobali’ fruits. Furthermore, in order to verify the function of PpPGIP, the constitutive plant expression vector of PpPGIP was constructed and transferred into tobacco (Nicotiana tabacum L. cv Xanthi). The Southern blot and real-time PCR analyses demonstrated that the PpPGIP gene was integrated into the genome of the tobacco transformants and highly expressed in the transgenic lines. The antifungal activity of PpPGIP was detected in vitro plates, and the crude protein extract of transgenic tobacco plants inhibited the hyphal growth of Phomopsis sp., Alternaria sp., Penicillium sp., and Aspergillus niger in different degrees.

18

A simple and efficient method for obtaining transgenic soybean callus tissues

61%

Liu D., Liu S., Chang D., Wang D., Wang N. N., Wang L.

Acta Physiologiae Plantarum

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2013

|

tom 35

|

nr 07

In the present study, a simple and efficient method for obtaining transgenic callus tissues of soybean [Glycine max (L.) Merr.] was developed based on Agrobacterium-mediated transformation. Hypocotyl segments of soybean were used as the starting material. Several factors such as soybean genotype, Agrobacterium concentration, inoculation time, co-cultivation period and addition of antioxidants in co-cultivation medium affecting the transformation efficiency were examined. The explants were cultured on callus induction medium containing 0.5 mg L-1 6-benzylaminopurine and 2.0 mg L-1, 2,4- Dichlorophenoxyacetic acid for callus induction. Callus tissues were induced at both the acropetal and basipetal ends. CaMV35S::GUS and CaMV35S::GFP transgenic callus tissues were obtained using the optimized protocol. The average transformation efficiency reached up to 87.7 %based onGUS detection. From inoculation with Agrobacterium to obtaining transgenic soybean callus will take about 3 weeks. In order to validate this method for gene function investigation, GVG::GmSARK transgenic soybean callus tissues were obtained and their senescence-associated phenotypes were assessed. To our knowledge, this is the first report using hypocotyl segments as starting materials to obtain transgenic callus, and this system provides a method for high-throughput screening of functional genes of interest in transformed soybean callus.

19

Mitochondrial uncoupling protein silence is compromised in photosynthesis and redox poise

61%

Chen S., Jin W., Liu A.-r., Liu Z., Liu D., Xia X., Lin X.

Acta Physiologiae Plantarum

|

2013

|

tom 35

|

nr 08

Mitochondrial uncoupling proteins play important roles in generation of metabolic thermogenesis, response to stress situations, and regulation of energy metabolism. We demonstrated here that the absence of LeUCP in tomato inhibited photosynthesis using virusinduced gene-silencing approach. A significant decrease in the rate of CO2 assimilation in LeUCP-silencing plants was observed over a range of different light intensities. Absence of LeUCP resulted in lower net photosynthetic rate, lightsaturated rate of the CO2 assimilation (Asat), maximum carboxylation rates (Vcmax) and maximum RuBP regeneration rate (Jmax). Activities of ribulose-1,5-bisphosphate carboxylase/oxygenase Rubisco and stromal fructose-1,6- bisphosphatase and genes expression levels encoded Calvin cycle enzymes of LeUCP gene-silencing plants were inhibited. However, silencing of LeUCP gene had no effect on Fv/Fm, but decreased photochemical quenching and electron transport rate. Meanwhile, non-photochemical quenching and Je (PSII), the distribution of Je (PCR) and Je (PCO), the content of AsA, NAD, and the ratios of NAD?/ NADH, AsA/DHA were significantly reduced with increased reactive oxygen species while GSH and GSSG were unaltered. Taken together, these results strongly suggest that LeUCP gene in tomato leaves is crucial in maintaining the redox poise of the mitochondrial electron transport chain to facilitate photosynthetic metabolism.

20

Purification, characterization and inhibition of alanine racemase from a pathogenic strain of Streptococcus iniae

61%

Muhammad M., Li Y., Gong S., Shi Y., Ju J., ZhaoB., Liu D.

Polish Journal of Microbiology

|

2019

|

tom 68

|

nr 3

Ograniczanie wyników

New species of oribatid mites of the families Parakalummidae and Galumnidae (Acari: Oribatida) from Xiao Hinggan Mountains, Northeastern China

Descriptions of two new species of Austrophthiracarus Balogh et Mahunka, a newly recorded genus of ptyctimous mites from China (Acari: Oribatida: Phthiracaridae)

Descriptions of two new species of the family Oribotritiidae (Acari: Oribatida: Euphthiracaroidea)

Cadmium accumulation and its effects on growth and gas exchange in four populus cultivars

Expression analysis and functional characterization of a cold-responsive gene COR15A from Arabidopsis thaliana

Nutrient resorption and use efficiency at different canopy heights of Alpine tree species Abies georgei var. smithii [Viguie et Gaussen] Cheng, Tibetan Plateau

Taxonomic study of the genus Maerkelotritia Hammer, 1967 (Acari: Oribatida: Oribotritiidae) from China, with description of a new species

Modelling suitable habitat and ecological characteristics of old trees using DIVA-GIS in Anhui Province, China

Effects of cadmium stress on root tip cells and some physiological indexes in Allium cepa var. agrogarum L.

Chromium accumulation and its effects on other mineral elements in Amaranthus viridis L.

Effect of Cu2plus concentration on growth, antioxidant enzyme activity and malondialdehyde content in garlic [Allium sativum L.]

Study of the clogging properties of mixed leachate

A synthetic wheat with 56 chromosomes derived from Triticum turgidum and Aegilops tauschii

Antioxidant response system and chlorophyll fluorescence in chromium [VI] - treated Zea mays L. seedlings

Ultrastructural and photosynthetic response of Populus 107 leaves to cadmium stress

Histology of tissues and cell wall of rice straw influenced by treatment with different chemicals and rumen degradation

Characterization and functional analysis of a novel PGIP gene from Pyrus pyrifolia Nakai cv Huobali

A simple and efficient method for obtaining transgenic soybean callus tissues

Mitochondrial uncoupling protein silence is compromised in photosynthesis and redox poise