Xinjiang Agricultural Sciences ›› 2024, Vol. 61 ›› Issue (9): 2094-2102.DOI: 10.6048/j.issn.1001-4330.2024.09.003
• Crop Genetics and Breeding·Germplasm Resources·Molecular Genetics·Cultivation Physiology·Physiology and Biochemistry • Previous Articles Next Articles
LI Yongtai(), GAO Axiang, LI Yanjun, ZHANG Xinyu(
)
Received:
2024-02-19
Online:
2024-09-20
Published:
2024-10-09
Correspondence author:
ZHANG Xinyu
Supported by:
通讯作者:
张新宇
作者简介:
李永泰(2000-),男,甘肃人,硕士研究生,研究方向为棉花分子育种,(E-mail)2049706098@qq.com
基金资助:
CLC Number:
LI Yongtai, GAO Axiang, LI Yanjun, ZHANG Xinyu. Effects of defoliants on the physiological characteristics of cotton varieties with different sensitivities[J]. Xinjiang Agricultural Sciences, 2024, 61(9): 2094-2102.
李永泰, 高阿香, 李艳军, 张新宇. 脱叶剂对不同敏感性棉花品种生理特性的影响[J]. 新疆农业科学, 2024, 61(9): 2094-2102.
Fig.1 Comparisons of sensitivity of different cotton varieties to defoliants at seedling stage Note: Figure 1A shows representative images of leaf abscission after 3, 6, and 9 days of defoliation treatment. TDZ represents the defoliation treatment, while CK represents the water-treated control. Figure 1B presents the statistical analysis of leaf abscission rates after 3, 6, and 9 days of defoliation treatment. Different lowercase letters indicate significant differences in the changes of photosynthetic rate among cotton varieties with different sensitivity at the same time (P<0.05), the data in the figure are presented as mean ± standard error
Fig.2 Changes of longitudinal section of petiole of cotton varieties with different sensitivity to defoliants after defoliation treatment at seedling stage Note: Abscission layer is indicated by the arrows. The sections were stained with toluidine blue. Scale bars are 500 μm
Fig.3 Changes of hotosynthetic rate leaves of cotton varieties with different sensitivity to defoliants after defoliation treatment at seedling stage Note: Different lowercase letters indicate significant differences in the changes of photosynthetic rate among cotton varieties with different sensitivity at the same time (P<0.05),The data in the figure are presented as mean ± standard error,the same as below
Fig.4 Changes of chlorophyll and carotenoid content in leaves of cotton varieties with different sensitivity to defoliants after defoliation treatment at seedling stage Note: Different lowercase letters indicate significant differences in the changes of chlorophyll and carotenoid content among cotton varieties with different sensitivity at the same time (P<0.05)
Fig.5 Changes of antioxidant enzyme activities and malondialdehyde content in leaves of cotton varieties with different sensitivity to defoliants after defoliation treatment at seedling stage Note: Different lowercase letters indicate significant differences in the changes of antioxidant enzyme activity and malondialdehyde (MDA) content among varieties with different sensitivity at the same time (P<0.05)
Fig.6 Changes of endogenous hormones content in leaves of cotton varieties with different sensitivity to defoliants after defoliation treatment at seedlings stage Note: Different lowercase letters indicate significant differences in the changes of endogenous hormone content among varieties with different sensitivity at the same time (P<0.05)
Fig.7 Changes of malondialdehyde content and endogenous hormone levels in leaves of cotton varieties with different sensitivity to defoliants after defoliation treatment at boll opening stage Note: Different lowercase letters indicate significant differences in the impact of cotton leaf malondialdehyde (MDA) content among varieties with different sensitivity at the same time (P<0.05)
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