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Zou J, Hu W, Loka DA, Snider JL, Zhu H, Li Y, He J, Wang Y, Zhou Z. Carbon assimilation and distribution in cotton photosynthetic organs is a limiting factor affecting boll weight formation under drought. Front Plant Sci 2022; 13:1001940. [PMID: 36212360 PMCID: PMC9532866 DOI: 10.3389/fpls.2022.1001940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
Previous studies have documented cotton boll weight reductions under drought, but the relative importance of the subtending leaf, bracts and capsule wall in driving drought-induced reductions in boll mass has received limited attention. To investigate the role of carbon metabolism in driving organ-specific differences in contribution to boll weight formation, under drought conditions. Controlled experiments were carried out under soil relative water content (SRWC) (75 ± 5)% (well-watered conditions, control), (60 ± 5)% (moderate drought) and (45 ± 5)% (severe drought) in 2018 and 2019 with two cultivars Yuzaomian 9110 and Dexiamian 1. Under severe drought, the decreases of photosynthetic rate (Pn) and carbon isotope composition (δ13C) were observed in the subtending leaf, bract and capsule wall, suggesting that carbon assimilation of three organs was restricted and the limitation was most pronounced in the subtending leaf. Changes in the activities of sucrose phosphate synthase (SPS), sucrose synthase (SuSy), invertases as well as the reduction in expression of sucrose transporter (GhSUT1) led to variabilities in the sucrose content of three organs. Moreover, photosynthate distribution from subtending leaf to seeds plus fibers (the components of boll weight) was significantly restricted and the photosynthetic contribution rate of subtending leaf to boll weight was decreased, while contributions of bracts and capsule wall were increased by drought. This, in conjunction with the observed decreases in boll weight, indicated that the subtending leaf was the most sensitive photosynthetic organ to drought and was a dominant driver of boll weight loss under drought. Therefore, the subtending leaf governs boll weight loss under drought due to limitations in carbon assimilation, perturbations in sucrose metabolism and inhibition of sucrose transport.
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Affiliation(s)
- Jie Zou
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Wei Hu
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Dimitra A. Loka
- Institute of Industrial and Forage Crops, Hellenic Agricultural Organization, Larissa, Greece
| | - John L. Snider
- Department of Crop and Soil Sciences, University of Georgia, Tifton, GA, United States
| | - Honghai Zhu
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Yuxia Li
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Jiaqi He
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Youhua Wang
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Zhiguo Zhou
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
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Feng Z, Li L, Tang M, Liu Q, Ji Z, Sun D, Liu G, Zhao S, Huang C, Zhang Y, Zhang G, Yu S. Detection of Stable Elite Haplotypes and Potential Candidate Genes of Boll Weight Across Multiple Environments via GWAS in Upland Cotton. Front Plant Sci 2022; 13:929168. [PMID: 35769298 PMCID: PMC9234699 DOI: 10.3389/fpls.2022.929168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 05/17/2022] [Indexed: 05/02/2023]
Abstract
Boll weight (BW) is a key determinant of yield component traits in cotton, and understanding the genetic mechanism of BW could contribute to the progress of cotton fiber yield. Although many yield-related quantitative trait loci (QTLs) responsible for BW have been determined, knowledge of the genes controlling cotton yield remains limited. Here, association mapping based on 25,169 single-nucleotide polymorphisms (SNPs) and 2,315 insertions/deletions (InDels) was conducted to identify high-quality QTLs responsible for BW in a global collection of 290 diverse accessions, and BW was measured in nine different environments. A total of 19 significant markers were detected, and 225 candidate genes within a 400 kb region (± 200 kb surrounding each locus) were predicted. Of them, two major QTLs with highly phenotypic variation explanation on chromosomes A08 and D13 were identified among multiple environments. Furthermore, we found that two novel candidate genes (Ghir_A08G009110 and Ghir_D13G023010) were associated with BW and that Ghir_D13G023010 was involved in artificial selection during cotton breeding by population genetic analysis. The transcription level analyses showed that these two genes were significantly differentially expressed between high-BW accession and low-BW accession during the ovule development stage. Thus, these results reveal valuable information for clarifying the genetic basics of the control of BW, which are useful for increasing yield by molecular marker-assisted selection (MAS) breeding in cotton.
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Affiliation(s)
- Zhen Feng
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Libei Li
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Minqiang Tang
- Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants (Ministry of Education), College of Forestry, Hainan University, Haikou, China
| | - Qibao Liu
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
| | - Zihan Ji
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Dongli Sun
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Guodong Liu
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Shuqi Zhao
- Huanggang Academy of Agricultural Sciences, Huanggang, China
| | - Chenjue Huang
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Yanan Zhang
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Guizhi Zhang
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Shuxun Yu
- College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A&F University, Hangzhou, China
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