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通过调节SPS活动,ALA促进早期桃子水果中糖的积累

Zheng Chen¹, Xin Guo^1,2, Jinhua Du^1,2

¹Institute of Pomology, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory of Horticultural Crop Genetic Improvement, 50 Zhongling Street, Nanjing 210014, China.

Current issues in molecular biology

|August 28, 2024

概括

外源的5 - 氨基氨酸 (ALA) 通过增加糖分的积累,增强桃子水果的甜味. 这与高糖酸盐合成酶 (SPS) 活性和特定桃子SPS基因 (PpSPS2和PpSPS3) 的表达有关.

科学领域:

植物生理学植物生理学
生物化学生物化学
分子生物学分子生物学

背景情况:

5 - 氨基乙烯酸 (ALA) 是一种植物生长调节剂,也是氨酸生物合成的前体.
众所周知,外源性ALA应用可以提高水果的甜味,但根本机制尚未完全理解.
了解ALA在糖代谢中的作用对于改善水果质量至关重要.

研究的目的:

研究ALA增加桃子果糖含量的机制.
确定糖酸盐合成酶 (SPS) 在ALA诱导的糖积累中的作用.
描述桃子中的SPS基因家族及其对ALA治疗的反应.

主要方法:

桃子被用ALA处理,在不同的时间点测量了糖糖含量和SPS活性.
进行了相关性分析,以评估糖糖含量与SPS活性之间的关系.
生物信息学工具被用来识别和分析桃子SPS (PpSPS) 基因家族.
进行定量实时PCR (qRT-PCR) 和烟草亚细胞局部化试验,以研究基因表达和蛋白质局部化.

主要成果:

ALA 治疗显著增加了桃子中的糖分积累和 SPS 酶活性.
在糖糖含量和SPS活性之间观察到正相关性.
确定了桃子SPS基因家族 (PpSPS1-4) 的四个成员.
在水果发育过程中,PpSPS2和PpSPS3在对ALA的反应中表达高,PpSPS2的表达与糖积累有正相关.
亚细胞定位揭示了细胞质和细胞核中的PpSPS2,以及细胞核中的PpSPS3.

结论:

ALA 促进桃子中的糖分积累,主要是通过对 SPS 活性进行上调.
PpSPS2基因在桃子水果发育期间在ALA介导的糖积累中发挥着重要作用.
这项研究为进一步研究ALA在水果糖代谢中的调节功能提供了基础.

关键词:

5 - 氨基氨基氨基氨基酸.这就是PpSPS2的原因.SPS活动活动SPS活动活动桃子桃子桃子

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