Drought-induced increase in wheat germ agglutinin (WGA) accumulation in developing wheat embryos appears to be independent of ABA

1999 ◽  
Vol 26 (8) ◽  
pp. 787 ◽  
Author(s):  
Priya Bhaglal ◽  
Prabhjeet Singh ◽  
S. S. Bhullar
Keyword(s):  
Triticum Aestivum ◽  
Abscisic Acid ◽  
Water Stress ◽  
Wheat Germ Agglutinin ◽  
Wheat Germ ◽  
Triticum Aestivum L ◽  
Stress Conditions ◽  
Grain Development ◽  
Natural Conditions ◽  
Wheat Embryos

Accumulation of wheat germ agglutinin (WGA) in the developing embryos of three different wheat (Triticum aestivum L.) cultivars, PBW-138, PBW-299 and C-306, was studied in relation to abscisic acid (ABA) accumulation under water stress conditions at 18, 24 and 30 days post anthesis (DPA) under natural conditions. Imposition of water stress in all three cultivars resulted in enhanced ABA levels in the embryos at all stages of grain development. On the contrary, the increase in WGA accumulation in the embryos in response to drought was stage- and cultivar-dependent. Our results suggest that apart from ABA, other factors that are temporally expressed may be involved in drought-induced regulation of the WGA gene.

Sterility in Wheat (Triticum aestivum L.) Induced by Water Deficit or High Temperature: Possible Mediation by Abscisic Acid

1982 ◽  
Vol 9 (5) ◽  
pp. 529 ◽  
Author(s):  
HS Saini ◽  
D Aspinall
Keyword(s):  
Triticum Aestivum ◽  
Abscisic Acid ◽  
High Temperature ◽  
Water Stress ◽  
Pollen Mother Cell ◽  
Mother Cell ◽  
Triticum Aestivum L ◽  
Pollen Sterility ◽  
Mother Cells ◽  
Abscisic Acid Content

The application of abscisic acid solution to developing spikes of wheat (cv. Gabo) via wicks threaded through peduncles at the stage of meiosis in pollen mother cells caused pollen sterility without affecting female fertility. The concentration of abscisic acid measured in the spikelets of plants treated in this manner was close to that induced by water stress, which produced a similar level of pollen sterility. After pollen mother cell meiosis, treatment with abscisic acid had no effect on pollen fertility, as has been shown previously with water stress. Abscisic acid applied immediately before meiosis reduced fertility, in contrast to the effect of water stress, but this may have been due to persistence of the hormone in the plant. High temperature during pollen mother cell meiosis had no effect on the endogenous abscisic acid content of the spikelets, even where the treatment caused a complete inhibition of grain set.

Evaluation of ACC-deaminase-producing rhizobacteria to alleviate water-stress impacts in wheat (Triticum aestivum L.) plants

2019 ◽  
Vol 65 (5) ◽  
pp. 387-403 ◽  
Author(s):  
Dinesh Chandra ◽  
Rashmi Srivastava ◽  
Vadakattu V.S.R. Gupta ◽  
Christopher M.M. Franco ◽  
Anil Kumar Sharma
Keyword(s):  
Triticum Aestivum ◽  
Water Stress ◽  
Plant Growth ◽  
Acc Deaminase ◽  
Triticum Aestivum L ◽  
Stress Conditions ◽  
Nutrient Concentrations ◽  
Pgp Traits ◽  
Plant Growth Promoting ◽  
Growth Promoting

Application of plant-growth-promoting rhizobacteria (PGPR) is an environmentally sustainable option to reduce the effects of abiotic and biotic stresses on plant growth and productivity. Bacteria isolated from rain-fed agriculture field soils in the Central Himalaya Kumaun region, India, were evaluated for the production of 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase. Those producing ACC deaminase in high amounts were evaluated for their potential to improve wheat (Triticum aestivum L.) plant growth under irrigated and water-stress conditions in two glasshouse experiments. Some of the isolates also showed other plant-growth-promoting (PGP) traits, e.g., N2 fixation, siderophore production, and phosphate solubilization; however, strains with higher ACC deaminase activity showed the greatest effects. These were Variovorax paradoxus RAA3; Pseudomonas spp. DPC12, DPB13, DPB15, DPB16; Achromobacter spp. PSA7, PSB8; and Ochrobactrum anthropi DPC9. In both simulated irrigated and water-stress conditions, a single inoculation of RAA3 and a consortium of DPC9 + DPB13 + DPB15 + DPB16 significantly improved wheat plant growth and foliar nutrient concentrations and caused significant positive changes in antioxidant properties compared with noninoculated plants especially under water stress. These findings imply that PGPB having ACC deaminase activity together with other PGP traits could potentially be effective inoculants to improve the growth of wheat plants in water-stressed rain-fed environments.

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