水土保持植物类芦对土壤酸胁迫的形态生理响应

doi:10.11686/cyxb2016170

草业学报 ›› 2017, Vol. 26 ›› Issue (4): 143-149.DOI: 10.11686/cyxb2016170

水土保持植物类芦对土壤酸胁迫的形态生理响应

陈雪娇¹, 韩航¹, 侯晓龙^{1, 2, 3, *}, 刘爱琴^{1, 2}, 蔡丽平^{1, 2}, 周垂帆^{1, 2}, 马祥庆^{1, 2}

1.福建农林大学林学院,福建福州350002;
2.福建农林大学资源与环境学院,福建福州350002;
3.海峡两岸红壤区水土保持协同创新中心,福建福州350002

收稿日期:2016-04-21 出版日期:2017-04-20 发布日期:2017-04-20
作者简介:陈雪娇(1989-),女,福建福州人,硕士。E-mail:960382981@qq.com
基金资助:
国家科技支撑计划项目(2014BAD15B02),国家自然科学基金(41401364),国家林业局林业公益性行业科研项目(201304303)和福建省自然科学基金(2013J01073)资助

The morphological and physiological responses of the soil and water conservation plant Neyraudia reynaudiana to acid stress

CHEN Xue-Jiao¹, HAN Hang¹, HOU Xiao-Long^{1, 2, 3, *}, LIU Ai-Qin^{1, 2}, CAI Li-Ping^{1, 2}, ZHOU Chui-Fan^{1, 2}, MA Xiang-Qing^{1, 2}

1.College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
2.College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
3. Cross-Strait Collaborative Innovation Center of Soil and Water Conservation, Fuzhou 350002, China

Received:2016-04-21 Online:2017-04-20 Published:2017-04-20

摘要/Abstract

摘要： 土壤酸度低是限制一些金属矿山废弃地植被恢复的主要因素之一,类芦可在酸度极低的稀土矿废弃地正常生长,其中可能存在对酸胁迫特殊的形态生理响应机制。因此,采用室内土培盆栽模拟胁迫试验,设计不同强度酸胁迫处理(pH: 3.5,4.5,5.0和5.6),测定不同酸胁迫条件下,类芦地上部分和根系生长、生物量、抗氧化酶活性及MDA含量等指标,探讨类芦对土壤酸胁迫的适应策略。结果表明,类芦对土壤酸胁迫有一定的耐性,pH 3.5处理仍能较正常生长;随土壤pH的逐渐增大,类芦地上部分和根系各生长指标整体表现为先增大后减小的变化趋势,弱酸胁迫对类芦根系生长有一定促进作用,pH 4.5处理均达最大值,为类芦最适宜生长的土壤酸度;酸胁迫条件下,类芦可通过加快根直径的生长,增大根系的生物量分配,以适应酸胁迫条件,但酸胁迫对类芦体内抗氧化酶活性具有一定抑制作用。

Abstract: Soil acidification is one of the main limitation factors affecting vegetation restoration in mining wastelands. Neyraudia reynaudiana can grow normally in the wasteland of rare earth mines with extremely serious soil acidification, indicating that it has specific morphological and physiological mechanisms. In order to reveal these mechanisms, a one-pot acid stress experiment was designed with four different pH levels (3.5, 4.5, 5.0 and 5.6) and the growth indices, biomass, antioxidant enzymes and MDA content of N. reynaudiana were measured. The results showed that N. reynaudiana grows normally in soil with pH 3.5, suggesting a strong resistance to acid stress. With the increase of soil pH, growth indices such as plant height, leaf length, number of leaves, tiller number, root length, root volume, root surface area and root diameter at first increased and then decreased, demonstrating that the low acid stress had a promotion effect on N. reynaudiana growth. In addition, all the growth indices for N. reynaudiana reached their peak under the pH 4.5 treatment, suggesting that this is the most suitable soil pH level for the species. N. reynaudiana adapts to acid stress by accelerating the root diameter growth rate and increasing the biomass allocation of the root. Our research also indicated that the antioxidant enzymes of N. reynaudiana were inhibited under acid stress.

陈雪娇, 韩航, 侯晓龙, 刘爱琴, 蔡丽平, 周垂帆, 马祥庆. 水土保持植物类芦对土壤酸胁迫的形态生理响应[J]. 草业学报, 2017, 26(4): 143-149.

CHEN Xue-Jiao, HAN Hang, HOU Xiao-Long, LIU Ai-Qin, CAI Li-Ping, ZHOU Chui-Fan, MA Xiang-Qing. The morphological and physiological responses of the soil and water conservation plant Neyraudia reynaudiana to acid stress[J]. Acta Prataculturae Sinica, 2017, 26(4): 143-149.

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水土保持植物类芦对土壤酸胁迫的形态生理响应

The morphological and physiological responses of the soil and water conservation plant Neyraudia reynaudiana to acid stress

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