Tomato arabinosyltransferase prevents precocious senescence

IF 5.7 1区 农林科学 Q1 HORTICULTURE Horticultural Plant Journal Pub Date : 2024-03-09 DOI:10.1016/j.hpj.2023.11.006
Ho-Young Jeong, Yoonseo Lim, Myeong-Gyun Seo, Soon Ju Park, Chanhui Lee, Young-Joon Park, Choon-Tak Kwon
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Abstract

Senescence, a crucial developmental process in the life cycle of plants, involves programmed destruction of cellular components of leaves. The onset of senescence is synchronized with other developmental processes for successful reproduction since senescence eventually leads to cell death. Arabinosyltransferase FASCIATED AND BRANCHED 2 (FAB2) is known to control meristem proliferation. Here, we show that FAB2 can inhibit premature leaf senescence in tomato plants. Both chemically mutagenized and CRISPR-generated mutants exhibited excessively accelerated senescence, which resulted in sterility. Transcriptome analysis revealed that extended leaf longevity by suppressing transcription of genes highly expressed in mature leaves. Transcription of was increased in younger leaves, potentially inhibiting premature leaf senescence. The precocious senescence of mutants was in contrast to () mutants, which carried mutations in a hydroxyproline O-arabinosyltransferase gene, leading to meristem overproliferation. Our observations indicate that complex genetic hierarchy in the cascade of tomato arabinosyltransferases could control different aspects of developmental processes such as stem cell proliferation and senescence.
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番茄阿拉伯糖基转移酶可防止早衰
衰老是植物生命周期中的一个关键发育过程,涉及叶片细胞成分的程序性破坏。由于衰老最终会导致细胞死亡,因此衰老的开始要与其他发育过程同步,这样才能成功繁殖。已知阿拉伯糖基转移酶 FASCIATED AND BRANCHED 2(FAB2)能控制分生组织的增殖。在这里,我们发现 FAB2 可以抑制番茄植株叶片的过早衰老。化学诱变和 CRISPR 产生的突变体都表现出过度加速衰老,从而导致不育。转录组分析揭示,通过抑制成熟叶片中高表达基因的转录,延长了叶片的寿命。年轻叶片中的基因转录增加,可能抑制了叶片的过早衰老。突变体的过早衰老与()突变体形成鲜明对比,后者携带羟脯氨酸 O-阿拉伯糖基转移酶基因突变,导致分生组织过度增殖。我们的观察结果表明,番茄阿拉伯糖基转移酶级联中复杂的遗传层次可控制干细胞增殖和衰老等发育过程的不同方面。
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来源期刊
Horticultural Plant Journal
Horticultural Plant Journal Environmental Science-Ecology
CiteScore
9.60
自引率
14.00%
发文量
293
审稿时长
33 weeks
期刊介绍: Horticultural Plant Journal (HPJ) is an OPEN ACCESS international journal. HPJ publishes research related to all horticultural plants, including fruits, vegetables, ornamental plants, tea plants, and medicinal plants, etc. The journal covers all aspects of horticultural crop sciences, including germplasm resources, genetics and breeding, tillage and cultivation, physiology and biochemistry, ecology, genomics, biotechnology, plant protection, postharvest processing, etc. Article types include Original research papers, Reviews, and Short communications.
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