首页|Gibberellins involved in fruit ripening and softening by mediating multiple hormonal signals in tomato

Gibberellins involved in fruit ripening and softening by mediating multiple hormonal signals in tomato

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The phytohormone ethylene is well known for its important role in the ripening of climacteric fruit,such as tomato(Solanum lycopersicum).However,the role and mode of action of other plant hormones in climacteric fruit ripening regulation are not fully understood.Here,we showed that exogenous GA treatment or increasing endogenous gibberellin content by overexpressing the gibberellin synthesis gene SlGA3ox2 specifically in fruit tissues delayed tomato fruit ripening,whereas treatment with the GA biosynthesis inhibitor paclobutrazol(PAC)accelerated fruit ripening.Moreover,exogenous ethylene treatment cannot completely reverse the delayed fruit ripening phenotype.Furthermore,exogenous GA treatment of ethylene signalling mutant Never ripe(Nr)or SlEBF3-overexpressing lines still delayed fruit ripening,suggesting that GA involved in fruit ripening partially depends on ethylene.Transcriptome profiling showed that gibberellin affect the ripening of fruits by modulating the metabolism and signal transduction of multiple plant hormones,such as auxin and abscisic acid,in addition to ethylene.Overall,the results of this study provide new insight into the regulation of gibberellin in fruit ripening through mediating multiple hormone signals.

Mengbo Wu、Kaidong Liu、Honghai Li、Ying Li、Yunqi Zhu、Dan Su、Yaoxin Zhang、Heng Deng、Yikui Wang、Mingchun Liu

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Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education,College of Life Sciences,Sichuan University,Chengdu,610065,Sichuan,China

Life Science and Technology School,Lingnan Normal University,Zhanjiang,524048,China

Sichuan Academy of Forestry,Chengdu,610081,Sichuan,China

Institute of Vegetable Research,Guangxi Academy of Agricultural Sciences,Nanning,530007,Guangxi,China

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四川省自然科学基金Institutional Research Funding of Sichuan University国家自然科学基金国家自然科学基金国家自然科学基金Applied Basic Research Category of Science and Technology Program of Sichuan ProvinceApplied Basic Research Category of Science and Technology Program of Sichuan ProvinceApplied Basic Research Category of Science and Technology Program of Sichuan ProvinceTechnology Innovation and Application Development Program of Chongqing

2023NSFSC19912022SCUNL1053177237232172643321722712021YFQ00712022YFSY0059-12021YFYZ0010-5-LHcstc2021jscxcylhX0001

2024

10.1093/hr/uhad275

园艺研究(英文)

园艺研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.11(2)
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