Effects of Moisture Change on Fine Root Characteristics of Desert Plants Reaumuria soongorica and Salsola passerina

doi:10.11733/j.issn.1007-0435.2024.11.022

Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (11): 3530-3538.DOI: 10.11733/j.issn.1007-0435.2024.11.022

Effects of Moisture Change on Fine Root Characteristics of Desert Plants Reaumuria soongorica and Salsola passerina

SHEN Hui¹, SHAN Li-shan¹, MA Jing¹, XIE Ting-ting¹, WANG Hong-yong¹, YANG Jie¹, HE Cai^1,2

1. College of Forestry, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
2. Wuwei Academy of Forestry, Wuwei, Gansu Province 733000, China

Received:2024-03-08 Revised:2024-04-29 Published:2024-11-29

水分变化对荒漠植物红砂和珍珠猪毛菜细根性状的影响

申惠¹, 单立山¹, 马静¹, 解婷婷¹, 王红永¹, 杨洁¹, 何彩^1,2

1. 甘肃农业大学林学院, 甘肃兰州 730070;
2. 武威市林业科学研究院, 甘肃武威 733000

通讯作者: 单立山,E-mail:shanls@gsau.edu.cn
作者简介:申惠(1999-),女,汉族,甘肃临洮人,硕士研究生,主要从事荒漠植物生理生态研究,E-mail:2475872846@qq.com
基金资助:
国家自然科学基金(32160253)；国家自然科学基金(U23A2061)；甘肃省重点研发计划项目(22YF7FA117)；甘肃省优秀博士生项目(23JRRA1452)；甘肃省科技重大专项计划(22ZD6FA052)资助

Abstract

Abstract: In this study,the fine root characteristics of Reaumuria soongorica and Salsola passerina were quantified along the biogeographic gradient in the arid region of Northwest China,and the relationship between fine root characteristics and environmental factors was analyzed. The results showed that with the decrease of moisture content (from Wuwei to Jiuquan),the average diameter (AD) of Reaumuria soongorica increased gradually,the specific root length (SRL) and specific root area (SRA) decreased gradually,and the root nitrogen content (RNC) decreased. The opposite results were obtained for Salsola passerina. There were significant correlations between some characteristics of Reaumuria soongorica and Salsola passerina. The average annual precipitation (AP) and soil phosphorus content (SP) were positively correlated with the specific root length,specific root area and root nitrogen content of Reaumuria soongorica,and negatively correlated with the average diameter,while the results of Salsola passerine were opposite to those of Reaumuria soongorica. In summary,with the change of moisture content,Reaumuria soongorica tended to be conservative strategy,and Salsola passerina tended to be acquisition strategy;the average annual precipitation and soil phosphorus content were the main environmental factors affecting the fine root characteristics of the two species. Both plants could survive and grow in the complex and changeable habitats of the desert through the trade-off or synergy between characteristics.

Key words: Fine root characteristics, Moisture variation, Environmental factors, Survival strategies

摘要： 本研究在我国西北干旱区沿生物地理梯度，量化了红砂(Reaumuria soongorica)和珍珠猪毛菜(Salsola passerina)细根性状的变异，并分析了细根性状与环境因子的关系。结果表明：随着水分减少(从武威到酒泉)，红砂平均直径(Average diameter，AD)逐渐增大，比根长(Specific root length，SRL)、比根面积(Specific root area，SRA)逐渐减小，根氮含量(Root nitrogen content，RNC)降低；而珍珠猪毛菜得到相反的结果。红砂和珍珠猪毛菜部分性状间均存在显著或极显著的相关关系；年均降水量(Average precipitation，AP)、土壤磷含量(Soil phosphorus content，SP)与红砂的比根长、比根面积、根氮含量正相关，与平均直径负相关，而珍珠猪毛菜的结果与红砂相反。综上，随水分的变化，红砂趋向保守策略，珍珠猪毛菜趋向获取策略；年均降水量、土壤磷含量是影响两物种细根性状的主要环境因子，两种植物均会通过性状间的权衡或协同使自身在荒漠复杂多变的生境中存活和生长。

关键词: 细根性状, 水分变化, 环境因子, 生存策略

CLC Number:

S812.2

SHEN Hui, SHAN Li-shan, MA Jing, XIE Ting-ting, WANG Hong-yong, YANG Jie, HE Cai. Effects of Moisture Change on Fine Root Characteristics of Desert Plants Reaumuria soongorica and Salsola passerina[J]. Acta Agrestia Sinica, 2024, 32(11): 3530-3538.

申惠, 单立山, 马静, 解婷婷, 王红永, 杨洁, 何彩. 水分变化对荒漠植物红砂和珍珠猪毛菜细根性状的影响[J]. 草地学报, 2024, 32(11): 3530-3538.

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Effects of Moisture Change on Fine Root Characteristics of Desert Plants Reaumuria soongorica and Salsola passerina

水分变化对荒漠植物红砂和珍珠猪毛菜细根性状的影响

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