两种药用植物生长和水分利用效率对干旱胁迫的响应

应用生态学报

两种药用植物生长和水分利用效率对干旱胁迫的响应

陈平¹,孟平¹,张劲松^1**,何春霞¹,贾长荣²,李建中²

(¹中国林业科学研究院林业研究所/国家林业局林木培育重点实验室, 北京 100091; ²济源市国有大沟河林场, 河南济源 454650)

出版日期:2014-05-18 发布日期:2014-05-18

Effects of drought stress on growth and water use efficiency of two medicinal plants.

CHEN Ping¹, MENG Ping¹, ZHANG Jin-song¹, HE Chun-xia¹, JIA Chang-rong², LI Jian-zhong²

(¹Research Institute of Forestry, Chinese Academy of Forestry/State Forestry Administration Key Laboratory of Tree Breeding and Cultivation, Beijing 100091, China; ^2Dagouhe National Forest Farm, Jiyuan 454650, Henan, China)

Online:2014-05-18 Published:2014-05-18

摘要/Abstract

摘要： 以田间持水量的30%、50%和75%为3个水分处理梯度，研究了决明子和菘蓝2种药用植物在不同水分处理和生长阶段的生长特性，并对稳定碳同位素分辨率(Δ¹³C)和水分利用效率(WUE)特征及二者之间的关系进行了分析．结果表明：与田间持水量的50%和30%相比，决明子和菘蓝在田间持水量75%的条件下具有较高的生长指标，说明这2种植物在充足或适当的水分条件下具有较高的生产力.随干旱胁迫程度的增加，决明子和菘蓝地上生物量和总生物量的Δ¹³C均逐渐减小，而地上生物量和总生物量的WUE均逐渐增加.决明子和菘蓝在不同水分处理之间各指标差异较小，说明这2种药用植物对干旱胁迫反应不敏感．菘蓝WUE与地上生物量和总生物量均呈显著负相关，决明子WUE与根冠比呈显著正相关.

Abstract: Growth characteristics, stable carbon isotope discrimination (Δ¹³C), water use efficiency (WUE), and their correlation of Cassia obtusifolia and Isatis indigotica were measured at three soil water levels, i.e., 30%, 50% and 75% of field water holding capacity (FWHC), and at three growth stages. The growth indices of the two medicinal plants at 75% of FWHC were higher than those at 30% and 50% of FWHC, suggesting that the two medicinal plants could obtain high production under sufficient moisture condition. The Δ¹³CA (aboveground biomassbased Δ¹³C) and Δ¹³CT(total biomassbased Δ¹³C) decreased, and the WUE-A(aboveground biomassbased WUE) and WUE-T(total biomassbased WUE) of C. obtusifolia and I. indigotica increased with the increasing degree of drought stress. The growth indices of the two medicinal plants had little difference in the different water treatments, which indicated that the two medicinal plants were insensitive to drought stress. Water use efficiency of I. indigotica had significant negative relationships with aboveground biomass and total biomass, while that of C. obtusifolia had a significant positive correlation with the root/shoot ratio.

陈平1,孟平1,张劲松1**,何春霞1,贾长荣2,李建中2. 两种药用植物生长和水分利用效率对干旱胁迫的响应[J]. 应用生态学报.

CHEN Ping1, MENG Ping1, ZHANG Jin-song1, HE Chun-xia1, JIA Chang-rong2, LI Jian-zhong2. Effects of drought stress on growth and water use efficiency of two medicinal plants.[J]. Chinese Journal of Applied Ecology.