Evaluation of Protocols for Measuring Leaf Photosynthetic Properties of Field-Grown Rice

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• 作者：Chang Tian-gen^a ; ^b ; Xin Chang-peng^a ; Qu Ming-nan^a ; Zhao Hong-long^a ; ^b ; ^{zhuxinguang@picb.ac.cn} ; Song Qing-feng^a ; Zhu Xin-guang^a ; ^b
• 关键词：rice ; gas exchange ; photosynthetic property ; in situ ; high efficiency all-weather photosynthetic measurement system
• 刊名：Rice Science
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：24
• 期：1
• 页码：1-9
• 全文大小：1024 K
• 卷排序：24

文摘

Largely due to the heterogeneity of environmental parameters and the logistical difficulty of moving photosynthetic equipment in the paddy fields, effective measurement of lowland rice photosynthesis is still a challenge. In this study, we showed that measuring detached rice leaves in the laboratory can not effectively represent the parameters measured in situ. We further described a new indoor facility, high-efficiency all-weather photosynthetic measurement system (HAPS), and the associated measurement protocol to enable whole-weather measurement of photosynthetic parameters of rice grown in the paddy fields. Using HAPS, we can conduct photosynthetic measurements with a time span much longer than that appropriate for the outdoor measurements. Comparative study shows that photosynthetic parameters obtained with the new protocol can effectively represent the parameters in the fields. There was much less standard deviation for measurements using HAPS compared to the outdoor measurements, no matter for technical replications of each recording or for biological replications of each leaf position. This new facility and protocol enables rice photosynthetic physiology studies to be less tough but more efficient, and provides a potential option for large scale studies of rice leaf photosynthesis.