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001-es BibID:	BIBFORM118222
035-os BibID:	(cikkazonosító)2200 (Scopus)85183036462
Első szerző:	Basal Oqba (agrármérnök)
Cím:	Elevated tolerance of both short-term and continuous drought stress during reproductive stages by exogenous application of hydrogen peroxide on soybean / Oqba Basal, Tahoora Batool Zargar, Szilvia Veres
Dátum:	2024
ISSN:	2045-2322
Megjegyzések:	The global production of soybean, among other drought-susceptible crops, is reportedly afected by drought periods, putting more pressure on food production worldwide. Drought alters plants` morphology, physiology and biochemistry. As a response to drought, reactive oxygen species (ROS) concentrations are elevated, causing cellular damage. However, lower concentrations of ROS were reported to have an alleviating role through up-regulating various defensive mechanisms on diferent levels in drought-stressed plants. This experiment was set up in a controlled environment to monitor the efects of exogenous spray of diferent (0, 1, 5 and 10 mM) concentrations of H2O2 on two soybean genotypes, i.e., Speeda (drought-tolerant), and Coraline (drought-susceptible) under severe drought stress conditions (induced by polyethylene glycol) during fowering stage. Furthermore, each treatment was further divided into two groups, the frst group was kept under drought, whereas drought was terminated in the second group at the end of the fowering stage, and the plants were allowed to recover. After 3 days of application, drought stress signifcantly decreased chlorophyll-a and chlorophyll-b, total carotenoids, stomatal conductance, both optimal and actual photochemical efciency of PSII (Fv/Fm and Df/Fm, respectively), relative water content, specifc leaf area, shoot length and dry weight, and pod number and fresh weight, but signifcantly increased the leaf concentration of both proline and total soluble sugars, the root length, volume and dry weight of both genotypes. The foliar application of 1 mM and 5 mM H2O2 on Speeda and Coraline, respectively enhanced most of the decreased traits measurably, whereas the 10 mM concentration did not. The group of treatments where drought was maintained after fowering failed to produce pods, regardless of H2O2 application and concentration, and gradually deteriorated and died 16 and 19 days after drought application on Coraline and Speeda, respectively. Overall, Speeda showed better performance under drought conditions. Low concentrations of foliar H2O2 could help the experimented soybean genotypes better overcome the infuence of severe drought during even sensitive stages, such as fowering. Furthermore, our fndings suggest that chlorophyll fuorescence and the cellular content of proline and soluble sugars in the leaves can provide clear information on the infuence of both drought imposition and H2O2 application on soybean plants.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Scientific Reports. - 14 : 1 (2024), p. 1-19. -
További szerzők:	Zargar, Tahoora Batool (1997-) Veres Szilvia (1972-) (biológus, biológia középiskolai tanár, angol-magyar szakfordító)
Pályázati támogatás:	RRF-2.3.1-21-2022-00008 Egyéb TKP2021-NKTA-32 Egyéb
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