Evaluation of yield and quality attributes of barley cultivars with foliar spray of glycine betaine under lead toxicity

Sharma, Jyoti; Kumar, Sandeep; Kumar, Naveen; Yadav, Neha; Khyalia, Pradeep; Sharma, Asha

doi:10.1007/s42976-024-00496-5

Cited by 1 publication

(2 citation statements)

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“…The GB improves drought tolerance more for tolerant than sensitive varieties [23]. However, differences have been found in other studies, where GB has the same effect on various varieties [30,31]. The various responses of different stress-tolerant varieties caused by GB will need to be further clarified.…”

Section: Introductionmentioning

confidence: 82%

“…The effects of exogenous GB on plants greatly varied according to crop cultivar, stress duration, stress type, and GB concentration. Despite previous studies that reported different or the same roles of GB taking in tolerant cultivars and sensitive cultivars [ 23 , 30 , 31 ], the role is mainly researched based on the same stress. The reports regarding the different effects of foliar-applied GB on different tolerant cultivars to drought and flooding stresses have been limited, so far.…”

Section: Discussionmentioning

confidence: 99%

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Exogenous Glycinebetaine Regulates the Contrasting Responses in Leaf Physiochemical Attributes and Growth of Maize under Drought and Flooding Stresses

Wang,

Ahmad,

Wang

et al. 2024

Biology

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Flooding and drought are the two most devastating natural hazards limiting maize production. Exogenous glycinebetaine (GB), an osmotic adjustment agent, has been extensively used but there is limited research on its role in mitigating the negative effects of different abiotic stresses. This study aims to identify the different roles of GB in regulating the diverse defense regulation of maize against drought and flooding. Hybrids of Yindieyu 9 and Heyu 397 grown in pots in a ventilated greenhouse were subjected to flooding (2–3 cm standing layer) and drought (40–45% field capacity) at the three-leaf stage for 8 d. The effects of different concentrations of foliar GB (0, 0.5, 1.0, 5.0, and 10.0 mM) on the physiochemical attributes and growth of maize were tested. Greater drought than flooding tolerance in both varieties to combat oxidative stress was associated with higher antioxidant activities and proline content. While flooding decreased superoxide dismutase and guaiacol peroxidase (POD) activities and proline content compared to normal water, they all declined with stress duration, leading to a larger reactive oxygen species compared to drought. It was POD under drought stress and ascorbate peroxidase under flooding stress that played crucial roles in tolerating water stress. Foliar GB further enhanced antioxidant ability and contributed more effects to POD to eliminate more hydrogen peroxide than the superoxide anion, promoting growth, especially for leaves under water stress. Furthermore, exogenous GB made a greater increment in Heyu 397 than Yindieyu 9, as well as flooding compared to drought. Overall, a GB concentration of 5.0 mM, with a non-toxic effect on well-watered maize, was determined to be optimal for the effective mitigation of water-stress damage to the physiochemical characteristics and growth of maize.

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Section: Introductionmentioning

confidence: 82%