[1]刘海莉,杨蕾蕾,辛苗苗,等.硅对平邑甜茶幼苗干旱胁迫伤害的缓解[J].江苏农业学报,2019,(04):904-910.[doi:doi:10.3969/j.issn.1000-4440.2019.04.022]
　LIU Hai li,YANG Lei lei,XIN Miao miao,et al.Mitigative effect of silicon on drought stressinduced injuries in Malus hupenensis Rhed. Seedling[J].,2019,(04):904-910.[doi:doi:10.3969/j.issn.1000-4440.2019.04.022]
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硅对平邑甜茶幼苗干旱胁迫伤害的缓解()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年04期
页码:
904-910
栏目:
园艺
出版日期:
2019-08-31

文章信息/Info

Title:
Mitigative effect of silicon on drought stressinduced injuries in Malus hupenensis Rhed. Seedling
作者:
刘海莉1; 杨蕾蕾1; 辛苗苗1; 师雪艳2; 刘晶莹1
（1.西北农林科技大学生命科学学院/陕西省苹果重点实验室，陕西杨凌712100；2.西北农林科技大学园艺学院/陕西省苹果重点实验室，陕西杨凌712100 ）
Author(s):
LIU Haili1; YANG Leilei1; XIN Miaomiao1; SHI Xueyan2; LIU Jingying1
(1.College of Life Sciences / Shaanxi Key Laboratory of Apple, Northwest A&F University, Yangling 712100，China;2.College of Horticulture / Shaanxi Key Laboratory of Apple, Northwest A&F University, Yangling, Shaanxi 712100，China)
关键词:
硅转运蛋白; 活性氧; 叶绿体; 聚乙二醇
Keywords:
silicon transporter; reactive oxygen species; chloroplast; polyethylene glycol
分类号:
S145.9
DOI:
doi:10.3969/j.issn.1000-4440.2019.04.022
文献标志码:
A
摘要:
以15%聚乙二醇（PEG）6000模拟干旱胁迫，水培平邑甜茶（Malus hupenensis Rhed.）幼苗为试验材料，硅酸钠（2 mmol/L Na2SiO3·9H2O）作为硅源，研究硅对苹果幼苗干旱胁迫伤害缓解及促进植株生长的影响。结果显示,在PEG模拟干旱胁迫下，与不施硅相比，施硅处理的平邑甜茶幼苗硅转运蛋白转录水平升高、硅含量升高、生物量提高、叶片相对含水量提高；叶片中H2O2含量、丙二醛含量及相对电渗率维持在较低水平，叶绿体结构较完整且光合作用较强。表明施硅能够通过提高Lsi1基因转录进而提高平邑甜茶幼苗体内硅的含量，缓解干旱胁迫对苹果幼苗的氧化伤害，促进植株的生长。
Abstract:
The study was conducted to determine the effect and mechanism of exogenous silicon (Si) on apple seedling under drought stress. Drought stress imposed by 15% (W/V) polyethylene glycol (PEG) 6000 and Si was supplied as Na2SiO3·9H2O at 2 mmol/L. The results shown Si application increased expression level of silicon transporter gene Lsi1 and silicon content in apple seedling under PEG stress, which was contributing to maintaine H2O2 accumulation, malondialdehyde content and the relative electrolyte leakage at lower levels, and increased photosynthesis by protecting the chloroplast structure. In conclusion, exogenous silicon could increase silicon content in plant by enhance the expression level of Lsi1, and then alleviate oxidative damage of drought stress and improve the growth of apple seedlings.

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备注/Memo

备注/Memo:
收稿日期：2018-10-11 基金项目：国家自然科学基金项目（31401839） 作者简介：刘海莉(1992-)，女，陕西渭南人，硕士研究生，主要从事果树逆境生物学研究。（E-mail）liuhaili92612@163.com 通讯作者：刘晶莹，（E-mail）jingying8233@163.com
更新日期/Last Update: 2019-08-31