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.

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.

Assessment of wheat (Triticum aestivum L.) genotypes for high temperature stress tolerance using physico-chemical analysis

2020 ◽  
Vol 53 (2) ◽  
Author(s):  
Khalil Ahmed Laghari ◽  
Abdul Jabbar Pirzada ◽  
Mahboob Ali Sial ◽  
Muhammad Athar Khan ◽  
Jamal Uddin Mangi
Keyword(s):  
Triticum Aestivum ◽  
High Temperature ◽  
Chemical Analysis ◽  
Stress Tolerance ◽  
Temperature Stress ◽  
Triticum Aestivum L ◽  
High Temperature Stress ◽  
Physico Chemical

Comparative analysis of water stress-responsive transcriptomes in drought-susceptible and -tolerant wheat (Triticum aestivum L.)

2012 ◽  
Vol 55 (5) ◽  
pp. 349-360 ◽  
Author(s):  
Yong Chun Li ◽  
Fan Rong Meng ◽  
Chun Yan Zhang ◽  
Ning Zhang ◽  
Ming Shan Sun ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Comparative Analysis ◽  
Water Stress ◽  
Triticum Aestivum L

Cytokinins and abscisic acid in hardening winter wheat

1990 ◽  
Vol 68 (7) ◽  
pp. 1597-1601 ◽  
Author(s):  
John S. Taylor ◽  
Munjeet K. Bhalla ◽  
J. Mason Robertson ◽  
Lu J. Piening
Keyword(s):  
Triticum Aestivum ◽  
Abscisic Acid ◽  
Winter Wheat ◽  
Leaf Tissue ◽  
Triticum Aestivum L ◽  
Early Spring ◽  
Growth Chamber ◽  
Late Winter ◽  
Sequence Of Events ◽  
Freeze Dried

During overwintering in a northern climate, winter wheat goes through a hardening process, followed by dehardening in late winter – early spring. This sequence of events may be partially controlled by changes in endogenous hormone levels. Crowns and leaf tissue from field grown winter wheat (Triticum aestivum L. cv. Norstar) seeded at the beginning of September were collected and freeze-dried at monthly intervals during the winters of 1985–1986 and 1986–1987. Material was also sampled and freeze-dried from seedlings grown in a growth chamber under hardening conditions (21 °C for 2 weeks plus 3 °C for 6 weeks) or nonhardening conditions (3 weeks at 21 °C). The tissues were analysed for cytokinins and abscisic acid. Cytokinin levels, measured with the soybean hypocotyl section assay, declined from October onwards and then rose to a peak in late winter (January and February, winter 1986–1987; February and March, winter 1985–1986), subsequently declining again. Abscisic acid, quantitated as the methyl ester by gas chromatography with an electron capture detector, increased in level from October to December, then decreased to a relatively low level between January and March. Hardened seedlings from the growth chamber contained significantly higher abscisic acid levels and significantly lower cytokinin levels than did the nonhardened seedlings. Key words: abscisic acid, cytokinins, hardening, Triticum aestivum, winter wheat.

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