Evaluation of Protocols for Measuring Leaf Photosynthetic Properties of Field-Grown Rice
Received date: 2016-06-01
Accepted date: 2016-08-24
Online published: 2016-11-01
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.
Tian-gen Chang, Chang-peng Xin, Ming-nan Qu, Hong-long Zhao, Qing-feng Song, Xin-guang Zhu . Evaluation of Protocols for Measuring Leaf Photosynthetic Properties of Field-Grown Rice[J]. Rice Science, 2017 , 24(1) : 1 -9 . DOI: 10.1016/j.rsci.2016.08.007
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