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干旱压力下的Paeonia ostii P5CS基因的功能性表征

Yuting Luan¹, Honglei An¹, Zijie Chen¹

¹College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou 225009, China.

Plants (Basel, Switzerland)

|August 10, 2024

概括

德尔塔-1-皮罗林-5-碳酸盐合成酶 (P5CS) 基因增强了植物对干旱的耐受性. 沉默PoP5CS降低了耐受性,而过度表达它通过增加proline和减少氧化应激增加了耐受性.

科学领域:

植物科学植物科学
分子生物学分子生物学
农业科学农业科学

背景情况:

全球气温上升加剧了水资源短缺,威胁到作物产量和农业可持续性.
氨酸是关键的溶解剂和抗氧化剂,对植物耐旱能力至关重要,其生物合成酶P5CS对压力作出积极反应.
佩奥尼亚骨,一个重要的木质油作物,需要提高干旱耐受性,以扩展种植.

研究的目的:

为了隔离和描述来自Paeonia ostii.的PoP5CS基因.
调查PoP5CS在P. ostii. 的干旱耐受性调节中的作用.
为开发耐旱的P. ostii品种提供遗传资源.

主要方法:

来自P. ostii. 的PoP5CS基因的分离和表征.
在干旱压力下分析PoP5CS基因表达.
基因沉默在P. ostii和基因过度表达在Nicotiana tabacum,以评估耐旱性.
测量普罗林含量,反应性氧物种 (ROS),相对电导率 (REC) 和马隆迪 (MDA) 水平.

主要成果:

编码613个氨基酸的PoP5CS基因从P. ostii中分离出来,并发现它位于细胞质中.
在P. ostii. 中,PoP5CS表达随着干旱压力严重程度的增加而增加.
在P. ostii中抑制PoP5CS降低了干旱耐受性,素含量,并增加了ROS,REC和MDA.
在烟草中过度表达PoP5CS增强了抗干旱能力,增加了素,并减少了ROS,REC和MDA.

结论:

PoP5CS基因在Paeonia ostii.中介干旱耐受性方面发挥着重要作用.
PoP5CS在林生物合成和抗氧化剂防御干旱压力中的功能.
这项研究提供了宝贵的见解和遗传资源,用于繁殖抗旱的Paeonia ostii.

关键词:

在P5CS中,它是P5CS.这种植物是Paeonia ostii.干旱造成的压力是干旱.普罗林是什么意思普罗林是什么意思

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