Does Glycine Betaine and Salicylic Acid Ameliorate the Negative Effect of Drought on Wheat by Regulating Osmotic Adjustment through Solutes Accumulation?

Journal of Stress Physiology & Biochemistry

卷:9

关键词: (Triticum aestivum L.);    drought;    glycine betaine;    osmolytes;    salicylic acid;    yield;   

DOI  :  

来源: DOAJ

【 摘 要 】

Apotexperiment wasconducted to evaluatethebeneficialeffect offoliar application of glycine betaine (10mM), grain presoaking in salicylic acid (0.05 M) and their interaction on droughttoleranceoftwowheat(Triticumaestivum L.)cultivars(sensitive,Sakha94and resistant, Sakha 93). Osmotic pressure, some osmolytes concentration and grain yield were determined.Waterstresscausedanincreaseinosmoticpressure,proline,totalsoluble nitrogen, total soluble sugars, organic acids, ions (Na+, K+, Ca+2, Mg+2 and Cl-) content as well as Na+/K+ ratio in cell sap flag leaves of both wheat cultivars. The resistant variety had higher values of osmotic pressure, proline, organic acids and ions content than the sensitive one. On the other hand, water stress induced marked decrease (P<0.05) in grain yield. The applied chemicals mitigated the effect of water stress on the used wheat cultivars. The effect was morepronouncedwithglycinebetaine+salicylicacidtreatment.Theappliedchemicals increasedtheosmoticpressure,theosmolytesconcentrationsaswellasthegrainyield. Furthermore, the osmotic pressure of flag leaf sap appeared to depend on proline, TSN, TSS, organic acids and the ions content. The economic yield (grain yield) was positively correlated with proline, keto-acids and osmotic pressure but negatively correlated with TSN, TSS and citric acid.

【 授权许可】

Unknown