Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

The profiling of osmotic adjustment and water status in Apera intermedia exposed to salinity

100%

Yildiztugay E., Ozfidan-Konakci C., Kucukoduk M., Duran Y.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

2

The impacts of BSMV on vegetative growth and water status in hulless barley (Hordeum vulgare var. nudum) in VIGS study

100%

Liang J., Chen X., Zhao H., Yu S., Long H., Deng G., Pan Z., Yu M.

Acta Societatis Botanicorum Poloniae

|

2015

|

tom 84

|

nr 1

Barley stripe mosaic virus (BSMV) is an established and extensively used virus-induced gene silencing (VIGS) vector for gene function analysis in monocots. However, the phenotypes generated by targeted gene silencing may be affected or masked by symptoms of BSMV infection. To better understand the potential effects of BSMV-VIGS in hulless barley (Hordeum vulgare var. nudum), the accumulation pattern of BSMV and its impacts on vegetative growth and water status were investigated. The results indicated that the vegetative growth of infected plants was significantly and continuously impacted by BSMV from 10 to 40 days post inoculation (dpi). When the accumulation of BSMV was extremely high (7 to 11 dpi), infected plants displayed twisted leaf tips with an increased water lose rate (WLR) and decreased water content (WC). Virus accumulation declined and stabilized after 25 dpi, at this stage, the WLR and WC were unaffected in the infected plants. The efficiency of VIGS was tested by the silencing of Phytoene desaturase (PDS). RT-qPCR indicated that BSMV-VIGS can be sustained with good efficiency for up to 40 dpi under an altered condition with lower temperature (22 ±1°C) and higher relative humidity (70 ±10%). It was concluded that 25 to 40 dpi was the appropriate time zone for drought-related gene analysis by BSMV-VIGS under such condition.

3

Ecophysiological mechanisms of succulent survival in natural conditions: photosynthetic carbon fixation in Caralluma acutangula (Decne. N.E.Br.) (Asclepiadaceae)

80%

Masrahi Y. S., Al-Yemeni M. N., Al-Turki T. A., Sayed O. H.

Polish Journal of Ecology

|

2011

|

tom 59

|

nr 3

Physiological adaptation to arid environments in many desert succulents involves crassulacean acid metabolism (CAM) with modified photosynthetic carbon acquisition aimed at improving water use efficiency. The leafless perennial Caralluma acutangula is an abundant stem succulent in the arid regions of subtropical zones of the Arabian Peninsula. These arid regions southwest of Saudi Arabia are characterized by a short three months wet season (June–August) and a long dry season. The wet season is characterized by high temperature, high evaporation, and strong sand storms. Research presented in this paper involved water status, diffusive conductance, and crassulacean acid metabolism (CAM) of both seedlings and mature C. acutangula plants growing under natural conditions. Plant water status was determined by monitoring changes in stem water content, diffusive conductance was monitored using porometry technique, and CAM was detected by determining chlorenchyma titratable acidity. Seedling establishment of C. acutangula takes place in the short wet season during which seedlings depend on the high productivity C3 mode of photosynthesis. Mature plants are obligate CAM plants exhibiting this mode of carbon fixation during both the wet and the dry seasons. As the dry season progresses dampening of CAM acidification-deacidification cycles and low stomatal conductance denote the switch of mature plants from CAM to CAM-idling in response to protracted water stress. Our results show that the C3 mode of photosynthesis in C. acutangula seedlings during early ontogeny is due to exposure of seedlings to suboptimal irradiance in the shade of other plant species at the study site. This C3 mode of photosynthesis is beneficial for fast seedling establishment. Our results also show that the shift from CAM to CAM-idling in mature C. acutangula plants occurs in response to protracted water stress, which is favourable for survival of this succulent in its inimical arid habitat.

4

Effect of soil salinity on growth, water status and nutrient accumulation in seedlings of Ziziphus mauritiana [Rhamnaceae]

80%

Bhatt M. J., Patel A. D., Bhatti P. M., Pandey A. N.

Journal of Fruit and Ornamental Plant Research

|

2008

|

tom 16

383-401

5

Changes in plant water status, biochemical attributes and seed quality of black gram and green gram genotypes under drought

80%

Baroowa B., Gogoi N.

International Letters of Natural Sciences

|

2015

|

tom 42

Drought is one of the major abiotic stresses which adversely affect crop growth and production worldwide as water is vital for every aspect of plant growth and development. The present experiment was carried out during the growing seasons (September – December) of 2012 and 2013 to evaluate the response of black gram (Vigna mungo L.) and green gram (Vigna radiata L.) in terms of some important growth indices, biochemical traits and seed quality under drought stress. Four commonly grown genotypes - T9, KU 301(black gram) and Pratap, SG 21-5 (green gram) of Assam, India were grown in a randomized block design with three replications under stress and non-stress conditions. Stress was applied by withholding irrigation for fifteen consecutive days at vegetative, flowering and pod filling stages. Leaf area index (LAI), seed protein content and protein yield significantly decreased (p ≤ 0.01) whereas proline, total flavonoids and anthocyanin content increased significantly (p ≤ 0.01) in response to water deficiency. Among the studied genotypes, T9 and Pratap showed better tolerance capacity towards the applied drought by presenting higher values of LAI, plant height stress tolerance index (PHSI), dry matter stress tolerance index (DMSI), proline, total flavonoids, anthocyanin, lower percentage of chlorophyll degradation and finally producing high quality seeds.

6

Analiza zmian w stanie uwodnienia liści kukurydzy poddanych suszy i żerowaniu przędziorka chmielowca (Tetranychus urticae Koch)

71%

Czapla A., Swiatek M., Kielkiewicz M.

Progress in Plant Protection

|

2010

|

tom 50

|

nr 2

Maize (Zea mays L.) hybrid with the Bt transgene from the bacterium Bacillus thuringensis (Bt) (DKC 3421 YG) and its non-Bt near-isoline (DKC 3420) as well as Polish cultivar Bosman (HR Smolice) were subjected to drought stress and/or the two-spotted spider mite (Tetranychus urticae, Acarina: Tetranychidae) feeding to assess changes in the relative water content (RWC) and dry weight (DW) in leaves of different age (leaf: 7th, 8th, 9th, 10th). All plants were at the vegetative stage and grew under greenhouse conditions. The effect of both abiotic and biotic stress was analysed 4 and 6 days after treatment. The experiments conducted in two series showed that among examined maize cultivars, T. urticae feeding decreased RWC in Bosman cv. leaves only, while drought altered leaf RWC of plants in a similar manner – the older the leaf, the greater reduction of RWC. Drought alone and drought accompanied by T. urticae feeding significantly decreased RWC of maize leaves in all cultivars (DKC 3421 YG, DKC 3420, Bosman). Concluding, drought had a greater impact on leaf RWC of young maize plants than mite feeding.

7

Gospodarka wodna mad średnich doliny Odry w okresie IV-IX 2011 w warunkach zróżnicowanego zasilania wierzchnich warstw gleby

71%

Olszewska B., Plywaczyk L.

Acta Scientiarum Polonorum. Formatio Circumiectus

|

2013

|

tom 12

|

nr 3

W artykule przedstawiono i porównano gospodarkę wodną mad średnich w okresie od kwietnia do września 2011 r. dla dwóch profili glebowych zlokalizowanych w dolinie Odry poniżej i powyżej piętrzenia rzeki budowlą w Brzegu Dolnym. Analizy dokonano na tle warunków meteorologicznych, stanów wody w Odrze w przekroju górnej i dolnej wody na stopniu oraz głębokości zalegania wód gruntowych. Przeprowadzone pomiary uwilgotnienia gleb oraz obliczenia zapasów wody wykazały, że na wielkość zapasów wody oraz zmiany uwilgotnienia analizowanej gleby z obszaru poniżej spiętrzenia decydujący wpływ mają opady atmosferyczne. Natomiast w glebach doliny powyżej budowli piętrzącej, poza opadami atmosferycznymi, wpływ wywiera podsiąk z wód gruntowych.

Ograniczanie wyników

The profiling of osmotic adjustment and water status in Apera intermedia exposed to salinity

The impacts of BSMV on vegetative growth and water status in hulless barley (Hordeum vulgare var. nudum) in VIGS study

Ecophysiological mechanisms of succulent survival in natural conditions: photosynthetic carbon fixation in Caralluma acutangula (Decne. N.E.Br.) (Asclepiadaceae)

Effect of soil salinity on growth, water status and nutrient accumulation in seedlings of Ziziphus mauritiana [Rhamnaceae]

Changes in plant water status, biochemical attributes and seed quality of black gram and green gram genotypes under drought

Analiza zmian w stanie uwodnienia liści kukurydzy poddanych suszy i żerowaniu przędziorka chmielowca (Tetranychus urticae Koch)

Gospodarka wodna mad średnich doliny Odry w okresie IV-IX 2011 w warunkach zróżnicowanego zasilania wierzchnich warstw gleby