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1

Aeromonas punctata PNS-1: a promising candidate to change the root morphogenesis of Arabidopsis thaliana in MS and sand system

100%
Iqbal A., Hasnain S.
Acta Physiologiae Plantarum
|
2013
|
tom 35
|
nr 03
A model system of sand, comprising Arabidopsis plants inoculated with Aeromonas punctata PNS-1 strain, was used to evaluate the bacterial effect in modulation of plant root structure at second-order lateral root level. In MS media, the root morphogenesis was changed only at first-order lateral root level when inoculated with PNS-1 strain. Inoculation with PNS-1 strain was subjected to significant (P\0.01) increase in primary root length and lateral root density in both MS and sand system. However, this strain modulated the root structure in the sand environment in a complex manner that may be helpful for incitation of the plant–microbe interaction close to natural environment. In order to determine whether this change in root morphology was due to bacterial auxin, Arabidopsis transgenic line (DR5:GUS) was used to reveal the change in homeostasis of endogenous auxin. In PNS-1 inoculated transgenic seedlings of Arabidopsis plant (DR5:GUS), endogenous auxin in primary root apices and lateral roots was enhanced. For confirmation, PNS-1 was evaluated for auxin production in vitro, showed an increase in auxin production after supplementation of L-tryptophan. The presence of ACC deaminase activity in PNS-1 showed its possible involvement in primary root elongation. In the present study Aeromonas punctata PNS-1 is the potential candidate for triggering the change in root morphogenesis of Arabidopsis thaliana with the involvement of auxin and ACC deaminase production.
2

Effect of rhizobacterial-mediated auxin on growth promotion of wheat and mung bean plant

100%
Iftikhar F., Iqbal A.
Polish Journal of Environmental Studies
|
2019
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tom 28
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nr 5
The use of beneficial rhizobacteria as biofertilizers are best alternatives of chemical fertilizers and might be potential tools for sustainable agriculture. Plant growth promoting rhizobacteria (PGPR) increased crop production by using different mechanisms. Auxin, bacterial phytohormone, plays a significant role in cell elongation, cell division and cell differentiation of plants. The aim of our study was to investigate the native valuable rhizobacteria for growth promotion of wheat and Mung bean plants. The bacterial isolates from different regions of southern Punjab were screened on the basis of their auxin production potential. The auxin production ability was found to be up to 152 ug/ml. Out of 40 strains, 58.8% were gram-positive rods and the rest were gram negative. All the strains were evaluated for their plant growth-promoting potential while being applied on wheat and Mung bean plants, and observed their effect on plant growth promotion under laboratory conditions. These strains showed significant increases (p = 0.05) in root length, shoot length, dry and fresh weight of wheat and mung bean seedlings as compared to control. Our results indicated that PGPR are the best alternatives of chemical fertilizers and have more capability to increase plant growth and yield. It is a cheaper way to accomplish the increasing demand for food.
3

Heavy metal uptake and toxicity in tissues of commercially important freshwater fish (Labeo rohita and Wallago attu) from the Indus river, Pakistan

81%
Iqbal A., Tabinda A. B., Yasar A., Mahfooz Y.
Polish Journal of Environmental Studies
|
2017
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tom 26
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nr 2
The purpose of this study was to evaluate the accumulation of heavy metals in the liver, skin, gills, and muscles of two freshwater edible fish species (Labeo rohita and Wallago attu) collected from Taunsa barrage of the Indus River in Pakistan. Fish samples were collected on a seasonal basis and were analyzed by atomic absorption spectroscopy. Gills and liver accumulated relatively higher heavy metal concentrations. All fish organs accumulated the highest metal content in winter and the lowest in summer. Heavy metals accumulated in the order Fe>Zn>Ni>Cu>Pb>Cr>As in the body of Labeo rohita and the tissues with the abundance were liver>gills>skin>muscles. Similarly, the sequence of heavy metal accumulation in Wallago attu was Fe>Zn>Cu>Ni>Cr>Pb>As, and the targeted tissues were gills>liver>skin>muscles. Heavy metal bioaccumulation was different in both species. Fe was the highest and As was the least accumulated heavy metal in both of these fish species. The tissues of Wallago attu accumulated higher concentrations of Ni (83%), Cu (64%), Cr (50%), Fe (2.95%), and Zn (26%) compared to tissues of Labeo rohita. However, Pb (67%) and As (22%) accumulation in tissues of Labeo rohita were higher compared to their concentrations in tissues of Wallago attu. Overall metal burden was 10% higher in Wallago attu compared to Labeo rohita. Heavy metal concentration in fish tissues were compared with FAO threshold values.
4

Impact of mother root size and umbel order on the yield and quality of seed produced and resulting roots in carrot

80%
Amjad M., Anjum M. A., Iqbal A.
Plant Breeding and Seed Science
|
2005
|
tom 51
5
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Enhancement of zinnia seed germination and seedling emergence through magnetic seed stimulation

61%
Afzal I., Abbasi K. Y., Iqbal A., Younis A., Bakhtavar A., Rehman H. U.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2016
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tom 15
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nr 5
Poor seed germination is a main hindrance to the commercial cultivation of Zinnia (Zinnia elegans Jacq.). Seed enhancement is a useful strategy to improve germination of major agronomic and horticultural crops. A lab study was conducted to investigate the potential of magnetic seed stimulation as a seed enhancement tool and its influence on germination and emergence capacity of zinnia. Magnetic seed treatment with 50, 100 and 150 mT strength each for 5, 10 and 15 min was compared with control (untreated). Magnetic seed stimulation reduced time to 50% germination and mean germination time and increased final germination percentage, germination energy and germination index. Root length, shoot length, seedling fresh and dry weight was also increased as a result of magnetic seed stimulation. Furthermore, magnetic field treatment also enhanced α-amylase activity, total soluble sugars and reducing sugars levels. Among all seed treatments, magnetic field with strength of 100 mT for 15 min was the most effective physical treatment for improving seed germination and seedling growth of zinnia.
6

Novel antimicrobial and antioxidative activity by endophytic Penicillium roqueforti and Trichoderma reesei isolated from Solanum surattense

61%
Ikram N., Ali N., Jan G., Hamayun M., Jan F. G., Iqbal A.
Acta Physiologiae Plantarum
|
2019
|
tom 41
|
nr 09
Crop protection against phyto-pathogens has become a global challenge that can be tackled efficiently through natural resources, including endophytic fungi. Endophytes serve as a reservoir for the vast array of potent bioactive metabolites. We investigated the antioxidant and antibacterial potency of endophytes from the roots of Solanum surattense. The non-polar fraction of the cultural filtrate from the isolated strains was tried for antibacterial potency through agar plate diffusion assay. Among the isolated strains, Penicillium roqueforti (CGF-1) and Trichoderma reesei (CGF-11) had broad-spectrum antibacterial activity against phyto-pathogenic bacteria (Xanthomonas oryzae, Pseudomonas syringae, Agrobacterium tumefaciens, and Ralstonia solanacearum). The extracts of CGF-1 and CGF-11 achieved the best result against A. tumefaciens. Similarly, qualitative analysis of the ethyl acetate extracts P. roqueforti and T. reesei exposed the occurrence of alkaloids, flavonoids, phenols, steroids, and tannins. HPLC analysis also confirmed the presence ferulic acid, cinnamic acid, quercetin, and rutin in the non-polar fraction of the cultural filtrate from the isolated strains. The results conclude that P. roqueforti and T. reesei can play an active role against the plant pathogens by secreting the bioactive compounds to protect host plant. Furthermore, the antibacterial and antioxidant potential of the P. roqueforti and T. reesei suggests its use in agriculture and pharmaceutical industry.
7

Termiticidal and protozocidal potentials of eight tropical plant extracts evaluated against Odontotermes obesus Rambur (Blattodea; Termitidae) and Heterotermes indicola Wasmann (Blattodea; Rhinotermitidae

51%
Ashraf A., Quereshi N. A., Shaheen N., Iqbal A., Fatima H., Afzal M., Alhewairini S. S., Quershi M. Z.
Polish Journal of Environmental Studies
|
2020
|
tom 29
|
nr 5
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