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Variations of salt stress responses and functional identification of TgPYR1-like8 in Tulipa gesneriana

文献类型： 外文期刊

作者： Yang, Jinli 1 ; La, Yue 1 ; He, Tiancan 1 ; Yang, Haipo 1 ; Huo, Xinyi 1 ; Xiang, Lin 1 ; Qu, Lianwei 3 ; Cui, Guangfen 4 ; Chan, Zhulong 1 ; Xing, Guimei 3 ; Wang, Yanping 1 ;

作者机构： 1.Huazhong Agr Univ, Natl Key Lab Germplasm Innovat & Utilizat Hort Cro, Wuhan 430070, Peoples R China

2.Huazhong Agr Univ, Coll Hort & Forestry Sci, Wuhan 430070, Peoples R China

3.Liaoning Acad Agr Sci, Inst Floriculture, Shenyang 110000, Peoples R China

4.Yunnan Acad Agr Sci, Inst Floriculture, Kunming 650000, Peoples R China

关键词： Tulip; Salt stress; TgPYR1-like8; Transient expression; Salt sensitivity

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.3； 五年影响因子：4.5 ）

ISSN： 0304-4238

年卷期： 2024 年 330 卷

页码：

收录情况： SCI

摘要： Tulip cut flowers are mainly produced through hydroponic cultivation. The accumulation of nutrient substances in hydroponic solution generally resulted in ion stress and osmotic stress, which in turn affected the growth and ornamental characteristics of tulip plants. This study aimed to evaluate and compare the salt stress sensitivities of tulip cultivated varieties. The results indicated that most of tulip cultivars showed relatively high sensitivity to low concentrations of NaCl treatment, while the root growth and floral stalk elongation were significantly inhibited by 15 mM NaCl and flowering opening was completely prevented under 75 mM NaCl conditions. Salt stress caused differential accumulations of osmotic regulators including proline, soluble sugars and ions concentrations between two contrasting varieties. We further identified the function of TgPYR1-like8 which showed differential expression patterns among tulip cultivars and displayed the most expression abundance in flower petals. TgPYR1-like8 over expressed Arabidopsis lines showed hypersensitivity to salt treatment during seed germination and young seedlings growth when compared with wild-type plant. Transient silencing of endogenous TgPYR1-like8 in tulip petal discs decreased salt sensitivity and delayed salt-induced petal senescence. These findings provide evidences for revealing the function of TgPYR1-like8 in tulip salt stress responses and more clues on how to improve the hydroponic cultivation of different tulip varieties.

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