Abscisic acid induces PpeKIL1 to terminate fruit growth and promote fruit abortion in peach (Prunus persica)
文献类型： 外文期刊
作者： Zhou, Hui 1 ; Wang, Xiao 2 ; Amar, Mohamed Hamdy 3 ; Sheng, Yu 1 ; Shi, Pei 1 ; Qiu, Keli 4 ; Wang, Yunyun 4 ; Xie, Qingmei 1 ; Chen, Hongli 1 ; Pan, Haifa 1 ; Zhang, Jinyun 1 ;
作者机构： 1.Anhui Acad Agr Sci, Inst Hort, Key Lab Hort Crop Germplasm Innovat & Utilizat Coc, Key Lab Hort Crop Genet Improvement & Ecophysiol A, Hefei 230031, Peoples R China
2.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, Hefei 230031, Peoples R China
3.Desert Res Ctr, Egyptian Deserts Genbank, Cairo, Egypt
4.Anhui Agr Univ, Sch Life Sci, 130 Changjiangxi Rd, Hefei 230036, Peoples R China
5.Anhui Acad Agr Sci, Hefei 230031, Peoples R China
关键词： Fruit abortion; Senescence; Peach; ABA; KIRA1; KIL1
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.1； 五年影响因子：6.2 ）
ISSN： 0981-9428
年卷期： 2024 年 212 卷
页码：
收录情况： SCI
摘要： Abnormal pollination from chance events or hybridization between species leads to unusual embryo development, resulting in fruit abortion. To elucidate the mechanism underlying fruit abortion, we conducted a comprehensive analysis of the transcriptome and hormone profiles in aborting fruits (AF) derived from an interspecific cross between the peach cultivar 'Huangjinmi 3 ' and the Prunus mume cultivar 'Jiangmei', as well as in normal-seeded fruits (NF) resulting from an intraspecific cross of 'Huangjinmi 3 ' with the 'Manyuanhong' peach cultivars. Growth of AF was inhibited during the exponential growth phase, with up-regulation of oxidative stress related genes and down-regulation of DNA replication and cell cycle genes. Accumulation of the tissue growth-related hormones auxin and cytokinin was reduced in AF, while levels of the growth inhibiting hormone abscisic acid (ABA) were higher compared to NF. The increased ABA concentration aligned with downregulation of the ABA catabolism gene CYP707A2, which encodes abscisic acid 8 '-hydroxylase. Correlation analysis showed ABA could explain the maximum proportion of differently expressed genes between NF and AF. We also showed that expression of KIRA1-LIKE1 (PpeKIL1), a peach ortholog of the Arabidopsis KIRA1 gene, was up-regulated in AF. PpeKIL1 promotes senescence or delays normal growth in tobacco and Arabidopsis, and its promoter activity increases with exogenous ABA treatment. Our study demonstrates a candidate mechanism where ABA induces expression of PpeKIL1, which further blocks normal fruit growth and triggers fruit abscission.
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