期刊论文

Regulation effects of exogenous spermine on morphology and physiology of Toona ciliata seedlings under drought stress

Liu, Q.

中文

生态学杂志

1000-4890

2016

35

12

3266-3272

10.13292/j.1000-4890.201612.031

林业公益性行业科研专项（201504301）资助；

本校为第一且通讯机构

为了掌握持续干旱胁迫下外源精胺(Spm)对红椿幼苗的形态和生理调节效应,本研究以2年生红椿盆栽幼苗为试验对象,在人工遮雨棚中开展干旱胁迫及外源精胺调节试验,试验设置4个持续干旱胁迫处理:(1)对照(土壤相对含水量45%~50%,每天浇水至饱和状态,CK);(2)轻度干旱胁迫(土壤相对含水量30%~38%,持续干旱7 d);(3)中度干旱胁迫(土壤相对含水量25%~30%,持续干旱14 d);(4)重度干旱胁迫(土壤相对含水量, 持续干旱21 d)。然后,连续3天对轻度、中度和重度干旱胁迫处理喷施外源Spm(浓度为1 mmol·L~(-1))进行修复调节,并正常管护5天。结果表明:喷施Spm对重度干旱胁迫下植株形态损伤的修复速度远低于轻度和中度...

To understand the morphological and physiological regulation effects of exogenous spermine (Spm) on Toona ciliata Roem. seedlings under drought stress, two-year-old potted seedlings of T. cilliate were adopted as experimental materials, and a drought stress and exoge- nous Spm regulation experiment was carried out under rain shelter by combining persistent drought stress with soil moisture measurement. The experiment contained 4 drought stress treat- ments: control (relative soil water content 45%-50%, watering to saturation state of soil mois-...