浙江农业学报 ›› 2026, Vol. 38 ›› Issue (1): 67-75.DOI: 10.3969/j.issn.1004-1524.20250056

• 园艺科学 • 上一篇    下一篇

SlCHRC基因对高温环境下番茄花耐热性的影响

朱长松(), 纳琦婷, 张梦卓, 曹慧, 刘诗颖, 张正科, 孟兰环()   

  1. 海南大学 食品科学与工程学院,海南 海口 570228
  • 收稿日期:2025-01-20 出版日期:2026-01-25 发布日期:2026-02-11
  • 作者简介:孟兰环,E-mail:huanhuanaini1012@126.com
    朱长松,研究方向为采后果蔬贮藏分子生物学。E-mail:2539736122@qq.com
  • 通讯作者: 孟兰环

Effect of SlCHRC gene on tomato floral thermotolerance under high-temperature environment

ZHU Changsong(), NA Qiting, ZHANG Mengzhuo, CAO Hui, LIU Shiying, ZHANG Zhengke, MENG Lanhuan()   

  1. School of Food Science and Engineering, Hainan University, Haikou 570228, China
  • Received:2025-01-20 Online:2026-01-25 Published:2026-02-11
  • Contact: MENG Lanhuan

摘要:

为探究番茄(Solanum lycopersicum)原纤维蛋白(fibrillin, FBN)家族成员番茄质体类胡萝卜素相关蛋白(chromoplast-associated carotenoid-binding protein, CHRC)基因SlCHRC在高温胁迫中的作用,本研究比较了野生型番茄Micro Tom、SlCHRC基因编辑株系和过表达株系在高温胁迫下花的电解质渗透率、丙二醛(malondialdehyde, MDA)含量、抗氧化酶活性、抗坏血酸含量和热响应相关基因的表达差异。 结果表明,与野生型相比,高温胁迫下SlCHRC基因编辑株系花的电解质渗透率和MDA含量显著降低;超氧化物歧化酶(superoxide dismutase, SOD)、过氧化物酶(peroxidase, POD)和过氧化氢酶(catalase, CAT)活性,以及抗坏血酸含量显著升高;热响应相关基因SlsHSPSlHsfA2SlHSP20SlHSP70SlHSP90的转录水平也显著上调。SlCHRC过表达株系对高温的抗性显著低于野生型。以上结果表明,SlCHRC基因可能参与番茄高温胁迫响应的调控。

关键词: 番茄, SlCHRC基因, CRISPR/Cas9, 过表达, 花, 高温胁迫

Abstract:

To investigate the role of the chromoplast-associated carotenoid-binding protein (CHRC) gene in the fibrillin (FBN) family of tomato (Solanum lycopersicum) in response to high-temperature stress, electrolyte leakage rate, malondialdehyde (MDA) content, antioxidant enzyme activities, ascorbic acid content, and the expression of heat-responsive genes were compared among flowers of wild-type tomato Micro Tom, SlCHRC gene-edited lines, and SlCHRC overexpression lines under high-temperature stress. The results showed that, compared with wild-type plants, under high-temperature stress, SlCHRC gene-edited lines exhibited a significant decrease in electrolyte leakage rate and MDA content, while the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), as well as ascorbic acid content, were significantly increased. Transcriptional levels of heat-responsive genes SlsHSP, SlHsfA2, SlHSP20, SlHSP70, and SlHSP90 were also significantly increased. In contrast, SlCHRC overexpression lines showed significantly reduced thermotolerance compared with wild-type plants. These results indicate that the tomato SlCHRC gene may be involved in regulating the response to high-temperature stress.

Key words: tomato, SlCHRC gene, CRISPR/Cas9, overexpression, flower, high-temperature stress

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