干旱区生态环境知识资源中心(Arid): 毛乌素沙地油蒿光合电子传递速率生长季动态及其对环境因子的响应

Arid

	毛乌素沙地油蒿光合电子传递速率生长季动态及其对环境因子的响应
其他题名	Temporal dynamics in photosynthetic electron transfer rate of Artemisia ordosica in growing season and its response to environmental factors in Mu Us Sandy Land of northwestern China
	雒宇; 马莉; 靳川; 李鑫豪; 李成; 贾昕; 查天山
来源期刊	北京林业大学学报
ISSN	1000-1522
出版年	2021
卷号	43 期号:2 页码:54-62
中文摘要	【目的】探究干旱半干旱地区植被光合生理在生长季动态变化及其对各个影响因子的响应机制,对进一步了解该区植被对波动环境的适应性具有重要意义。【方法】该研究于2019年5-9月,对典型沙生植被油蒿的光合电子传递速率(ETR)进行长期原位连续监测,同步观测光合有效辐射(PAR)、空气温度(T_a )、相对湿度(RH)和土壤含水量(SWC)等环境因子,同时测定叶绿素含量(SPAD)。分析ETR的动态变化规律及其对主要影响因子的响应。【结果】 ETR与PAR、T_a、 SPAD显著相关(P < 0.05),ETR月均值7月份达到最大,9月份最小。ETR随光强的变化呈上升趋势,且在弱光条件下(PAR ≤ 800 mumol/(m~2·s))对光照响应强度大于强光。ETR随T_a的变化呈先上升后下降的趋势,5月(展叶期)和9月(落叶期)的高低温胁迫阈值分别为5和20 ℃,6-8月(成熟期)为10和25 ℃。ETR与SPAD呈线性正相关关系。成熟期ETR的稳定性小于展叶期和落叶期。【结论】通过以上研究发现PAR、T_a、SPAD是影响ETR的3个主要因子。在展叶期ETR主要受SPAD的影响,成熟期主要受温度和光强的影响,落叶期主要受植物生理的影响。油蒿在不同环境因子的交替作用下均体现出了良好的适应性。此外适当的升温能够促进光合电子的传递,增强植物光合能力。该研究结果可以为全球气候变暖下植物光合生理对环境响应的研究提供一定的理论指导,同时也为荒漠植被的恢复提供参考。
英文摘要	[Objective] Understanding the dynamics of electron transfer rate of typical sandy speices Artemisia ordosica and its response mechanism to environmental factors in desert area is very important to manage desert ecosystem to adapt to the fluctuating environment. [Method] This study conducted a longterm in situ continuous monitoring of photosynthetic electron transfer rate (ETR) in Artemisia ordosica in May-September of 2019 using chlorophyll fluorescence observation method. Photosynthetically active radiation (PAR), air temperature (T_a), chlorophyll content (SPAD) were simultaneously measured. [Result] ETR was significantly correlated with PAR, T_a and SPAD at a significant level of 0.05, with the monthly average reaching the maximum in July and the smallest in September. The change of ETR with light intensity showed an upward trend, and the response intensity to light under low light condition of PAR ≤ 800 mumol/(m~2·s) was greater than that of strong light. The change of ETR with T_a showed a trend of first increasing and then decreasing. The thresholds of high and low temperature stress in May (leaf-leaning stage) and September (deciduous stage) were 5 ℃ and 20 ℃, respectively, and June-August (mature stage) was 10 ℃ and 25 ℃. The relationship between ETR and SPAD was linear and positive, and the stability of ETR in mature stage was less than that in leaf-expansion stage and leaf-falling stage. [Conclusion] Through the above research, it was found that PAR, T_a, and SPAD were the three main factors affecting ETR. ETR was mainly affected by SPAD during the leaf-expansion stage, temperature and light intensity during the mature stage, and plant physiology during the defoliation stage. We found that Artemisia ordosica ETR showed a good adaptability under the alternating effect of the main influencing factors. Besides proper temperature increase can promote the transfer of photosynthetic electrons, thus enhance the photosynthetic capacity of plants. The results can not only provide some theoretical guidance for the response of plants photosynthetic physiology to the environment under global warming, but also a reference for the restoration of desert vegetation.
中文关键词	油蒿 ; 光合电子传递速率 ; 光合有效辐射 ; 空气温度 ; 叶绿素含量
英文关键词	Artemisia ordosica photosynthetic electron transfer rate (ETR) photosynthetically active radiation (PAR) air temperature chlorophyll content
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:6938367
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354156
作者单位	雒宇, 北京林业大学水土保持学院;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;北京林业大学, ;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;;;, 北京;;北京;;北京 100083;;100083;;100083, 中国.; 贾昕, 北京林业大学水土保持学院;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;北京林业大学, ;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;;;, 北京;;北京;;北京 100083;;100083;;100083, 中国.; 查天山, 北京林业大学水土保持学院;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;北京林业大学, ;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站;;水土保持国家林业局重点实验室, ;;;;, 北京;;北京;;北京 100083;;100083;;100083, 中国.; 马莉, 北京市园林设计工程有限公司, 北京 100083, 中国.; 靳川, 北京林业大学水土保持学院;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, ;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, ;;, 北京;;北京 100083;;100083, 中国.; 李鑫豪, 北京林业大学水土保持学院;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, ;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, ;;, 北京;;北京 100083;;100083, 中国.; 李成, 北京林业大学水土保持学院;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, ;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, ;;, 北京;;北京 100083;;100083, 中国.
推荐引用方式 GB/T 7714	雒宇,马莉,靳川,等. 毛乌素沙地油蒿光合电子传递速率生长季动态及其对环境因子的响应[J]. 北京林业大学,2021,43(2):54-62.
APA	雒宇.,马莉.,靳川.,李鑫豪.,李成.,...&查天山.(2021).毛乌素沙地油蒿光合电子传递速率生长季动态及其对环境因子的响应.北京林业大学学报,43(2),54-62.
MLA	雒宇,et al."毛乌素沙地油蒿光合电子传递速率生长季动态及其对环境因子的响应".北京林业大学学报 43.2(2021):54-62.