干旱区生态环境知识资源中心(Arid): 6个种源红砂幼苗光合作用特性研究

Arid

	6个种源红砂幼苗光合作用特性研究
其他题名	Study on Photosynthesis Characteristics of Six Provenances Reaumuria soongorica Seedlings
	魏晓芸; 单立山; 解婷婷; 张婉婷; 王珊; 马静; 贾海娟; 白亚梅
来源期刊	草地学报
ISSN	1007-0435
出版年	2020
卷号	28 期号:6
中文摘要	植物对环境的长期适应所形成的遗传特性对其光合作用有重要影响,本研究以6个种源地红砂(Reaumuria soongorica)幼苗为试验材料,采用LI-6400便携式光合作用系统对所标记的枝条进行净光合速率(Net photosynthesis,P_n)、蒸腾速率(T_ranspiration rate,T_r)、气孔导度(Stomatal conductance,G_s)的测定,分析其光合特性及其相关性,探究不同种源红砂幼苗光合特性变化规律。结果表明:6个种源红砂幼苗的净光合速率日变化曲线呈单峰或双峰型。在极端干旱生境条件下(酒泉金塔JQJ和酒泉肃州JQS)红砂种源幼苗具有较强的气孔调节能力,通过保持较低的蒸腾耗水而维持较高的水分利用效率(Water use efficiency,WUE)以适应干旱胁迫,表现出较强的光合抗旱性。6个种源红砂幼苗的P_n与T_r和G_s均呈显著正相关,体现了P_n,T_ r与G_s3者具有较好的协同效应;WUE与T_r和G_s呈显著负相关,表明T_r,G_s分别作为影响WUE的因子与其有着极其密切的关系。本研究表明不同种源红砂之间的光合特性有一定差异,酒泉种源较其他各种源而言更能够抵御环境胁迫,可作为植被恢复的优良种源在西北干旱、半干旱荒漠区推广应用。
英文摘要	The genetic characteristics formed by the long-term adaptation of plants to the environment have an important influence on their photosynthesis.This study measured the net photosynthetic rate(P_n), transpiration rate(T_r),and stomatal conductance(G_s)of the marked branches of six Reaumuria soongoricafrom different provenances,and analyze their photosynthetic characteristics and their correlations using a LI-6400photosynthetic analysis system.In addition,the changes of photosynthetic characteristics of different provenance Reaumuria soongorica seedlings were explored.The results showed that:The diurnal variation curve of net photosynthetic rate of six provenance Reaumuria soongorica seedlings showed a single peak or double peak type.Under extreme drought conditions(Jinta in Jiuquan and Suzhou in Jiuquan),the Reaumuria soongoricaseedling had strong stoma regulation ability.It can adapt to drought stress by maintaining lower transpiration water consumption and maintaining higher water use efficiency(WUE),showing strong photosynthetic drought resistance.The P_n,T_r and G_s of the six provenance Reaumuria soongorica seedlings were significantly negatively correlated,indicating that P_n,T_r and G_s had a good synergistic effect.WUE was significantly positively correlated with T_r and G_s,indicating that T_r and G_s as factors influencing WUE are extremely closely related to them.There are some differences in photosynthetic characteristics between different provenances of Reaumuria soongorica.Compared with other sources,the Jiuquan provenance is more resistant to environmental stress and can be used as an excellent provenance for vegetation restoration in the arid and semi-arid desert regions of Northwest China.
中文关键词	红砂 ; 种源 ; 气孔导度 ; 光合速率
英文关键词	Reaumuria soongorica Provenance Stomatal conductance Photosynthetic rate
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Fisheries
CSCD记录号	CSCD:6882738
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353340
作者单位	魏晓芸, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 单立山, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 解婷婷, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 张婉婷, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 王珊, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 马静, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 贾海娟, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 白亚梅, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	魏晓芸,单立山,解婷婷,等. 6个种源红砂幼苗光合作用特性研究[J]. 甘肃农业大学,2020,28(6).
APA	魏晓芸.,单立山.,解婷婷.,张婉婷.,王珊.,...&白亚梅.(2020).6个种源红砂幼苗光合作用特性研究.草地学报,28(6).
MLA	魏晓芸,et al."6个种源红砂幼苗光合作用特性研究".草地学报 28.6(2020).