Effects of Salinity Stress on Some Growth, Physiological, and Biochemical Parameters in Cotton (Gossypium hirsutum L.) Germplasm

ABSTRACT

The production of cotton is negatively affected by salinity. For this purpose, 8 parents and their 16 F1 hybrids were evaluated under saline stress (15 dSm⁻¹) in Line × Tester fashion. Mean values of plant height, number of bolls plant⁻¹, boll weight, lint weight, seed cotton yield plant⁻¹, seed index, no. of seeds boll⁻¹, seed mass boll⁻¹, lint mass boll⁻¹, seed volume per 100 seeds, fiber strength, fiber length, lint%, K⁺, K⁺/Na⁺ ratio, CAT, TSP, chlorophyll a, b, and relative water contents decreased under salt stress whilst the values of lint index, seed density, fiber fineness, Na⁺, H₂O_2, SOD, POD carotenoids, malondialdehyde, phenolic contents, ascorbic acid, and flavonoids increased under saline conditions. Under saline MS-71× CRS-2007, MS-71× KAHKASHAN, and IUB-65 × FH-312 exhibited performed better than other genotypes for most traits. For fiber quality traits IUB-65× CRS-2007 and IUB-65× FH-312 showed the highest value under salt stress. Improved identified cotton genotypes can enhance our capacity to grow cotton in salt-affected soils and the key morpho-biochemical traits can potentially be exploited to obtain higher and more stable crops yield under stressed environments.

摘要

棉花的生产受到盐分的负面影响. 为此,在盐胁迫(15 dSm-1)条件下,以线×测试员的方式对8个亲本及其16个F1杂种进行了评价. 株高、单株铃数、铃重、皮棉重、籽棉产量、单株铃数、种子指数、单株铃数、单株铃重、皮棉铃重、百粒种子体积、纤维强度、纤维长度、皮棉%、K+、K+/Na+比、CAT、TSP、叶绿素a,盐胁迫下,b和相对含水量降低,而衣分指数、种子密度、纤维细度、Na+、H2O2、SOD、POD-类胡萝卜素、丙二醛、酚类物质、抗坏血酸和黄酮类物质的含量增加. 在生理盐水MS-71×CRS-2007条件下,MS-71×KAHKASHAN和IUB-65×FH-312在大多数性状上表现优于其他基因型. 对于纤维品质性状, IUB-65×CRS-2007和IUB-65×FH-312在盐胁迫下表现出最高值. 改良鉴定的棉花基因型可以提高我们在受盐碱影响的土壤中种植棉花的能力, 关键的形态生化性状有可能被利用,以在胁迫环境下获得更高、更稳定的作物产量.

KEYWORDS:

• Gossypium hirsutum l. (cotton)
• salinity
• yield traits
• fiber traits
• antioxidants
• hydrogen peroxide

关键词:

• 陆地棉L(棉花)
• 盐度
• 产量性状、
• 纤维性状、
• 抗氧化剂、
• 过氧化氢

Authors’ contributions

MMZ and AS conceptualized and wrote the first original draft. MH, AM, and AS assisted in designing and statistics of the experiment. AS and HM edited the manuscript, and MAF and MR proofread the manuscript and gave the final approval for publication.

Acknowledgments

The authors are thankful to the Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad and Chickpea Biotechnology Lab, USPCAS-AFS for providing the space for experimentation. Dr. Muhammad Awais Farooq is also thankful to Higher education commission providing the funding through Ph.D. scholarship Pin # 315-1684-2AV3-007 for research.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Higher Education Commission (HEC), Pakistan [315-1684-2AV3-007].