Статья

Drought and heat stress on cotton genotypes suggested agro-physiological and biochemical features for climate resilience

Muhammad Mubashar ZafarDepartment of Plant Breeding and Genetics, University of Agriculture Faisalabad, Faisalabad, PakistanWaqas Shafqat ChatthaDepartment of Plant Breeding and Genetics, University of Agriculture Faisalabad, Faisalabad, PakistanAzeem Iqbal KhanDepartment of Plant Breeding and Genetics, University of Agriculture Faisalabad, Faisalabad, PakistanSaba ZafarDepartment of Biochemistry and Biotechnology, The Women University Multan, Multan, PakistanMishal SubhanDepartment of Microbiology and Molecular genetics, The Women University Multan, Multan, PakistanHuma SaleemUniversity of Agriculture FaisalabadArfan AliAqsa IjazNuclear Institute for Agriculture and Biology College (NIAB-C), Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, PakistanZunaira AnwarNuclear Institute for Agriculture and Biology College (NIAB-C), Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, PakistanFei QiaoSanya Institute of Breeding and Multiplication, Hainan University, Sanya, ChinaAmir ShakeelDepartment of Plant Breeding and Genetics, University of Agriculture Faisalabad, Faisalabad, PakistanMahmoud F. SeleimanPlant Production Department, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi ArabiaDaniel O. WasongaDepartment of Crop Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United StatesAqsa ParvaizDepartment of Biochemistry and Biotechnology, The Women University Multan, Multan, PakistanAbdul RazzaqInstitute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, PakistanJiang XuefeiSanya Institute of Breeding and Multiplication, Hainan University, Sanya, China

2023en

ABI

Аннотация

This study aimed to investigate the impact of individual drought, heat, and combined drought and heat stress on twelve cotton genotypes, including eight tolerant and four susceptible genotypes. A field experiment was carried out by employing a randomized complete block split-plot design, with treatments (control, drought, heat, drought + heat), and cotton genotypes assigned to the main plots and sub-plots respectively. The results showed that the combined stress had a more severe impact on the yield and fiber quality of cotton genotypes compared to individual stresses. Among the studied genotypes, FB-Shaheen, FH-207, MNH-886, and White Gold exhibited superior performance in regard to agronomic and fiber quality characters under combined stress environments. Physiological parameters, including transpiration rate, stomatal conductance, relative water contents, and photosynthetic rate, were significantly reduced under combined stress. However, specific genotypes, MNH-886, FH-207, White Gold, and FB-Shaheen, demonstrated better maintenance of these parameters, indicating their enhanced tolerance to the combined stress. Furthermore, the accumulation of reactive oxygen species was more pronounced under combined stress compared to individual stressors. Tolerant genotypes showed lower levels of H 2 O 2 and MDA accumulation, while susceptible genotypes exhibited higher levels of oxidative damage. Antioxidant enzyme activities, such as superoxide dismutase, peroxidase, and catalase, increased under combined stress, with tolerant genotypes displaying higher enzyme activities. Conversely, susceptible genotypes (AA-703, KZ 191, IR-6, and S-15) demonstrated lower increases in enzymatic activities under combined stress conditions. Biochemical traits, including proline, total phenolic content, flavonoids, and ascorbic acid, exhibited higher levels in resistant genotypes under combined stress, while sensitive genotypes displayed decreased levels of these traits. Additionally, chlorophyll a &amp; b, and carotenoid levels were notably decreased under combined stress, with tolerant genotypes experiencing a lesser decrease compared to susceptible genotypes.

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Идентификаторы

DOI: 10.3389/fpls.2023.1265700

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar