Effects of fully open-air [CO2] elevation on leaf photosynthesis and ultrastructure of Isatis indigotica Fort

Article

Hao, Xingyu, Li, Ping, Feng, Yongxiang, Han, Xue, Gao, Ji, Lin, Erda and Han, Yuanhuai. 2013. "Effects of fully open-air [CO2] elevation on leaf photosynthesis and ultrastructure of Isatis indigotica Fort." PLoS One. 8 (9), pp. 1-7. https://doi.org/10.1371/journal.pone.0074600
Article Title

Effects of fully open-air [CO2] elevation on leaf photosynthesis and ultrastructure of Isatis indigotica Fort

ERA Journal ID39745
Article CategoryArticle
AuthorsHao, Xingyu (Author), Li, Ping (Author), Feng, Yongxiang (Author), Han, Xue (Author), Gao, Ji (Author), Lin, Erda (Author) and Han, Yuanhuai (Author)
Journal TitlePLoS One
Journal Citation8 (9), pp. 1-7
Article Numbere74600
Number of Pages7
Year2013
PublisherPublic Library of Science (PLoS)
Place of PublicationUnited States
ISSN1932-6203
Digital Object Identifier (DOI)https://doi.org/10.1371/journal.pone.0074600
Web Address (URL)http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0074600
Abstract

Traditional Chinese medicine relies heavily on herbs, yet there is no information on how these herb plants would respond to climate change. In order to gain insight into such response, we studied the effect of elevated [CO2] on Isatis indigotica Fort, one of the most popular Chinese herb plants. The changes in leaf photosynthesis,chlorophyll fluorescence, leaf ultrastructure and biomass yield in response to elevated [CO2] (550619 mmol mol–1) were determined at the Free-Air Carbon dioxide Enrichment (FACE) experimental facility in North China. Photosynthetic ability of I. indigotica was improved under elevated [CO2]. Elevated [CO2] increased net photosynthetic rate (PN), water use efficiency (WUE) and maximum rate of electron transport (Jmax) of upper most fully-expended leaves, but not stomatal conductance (gs), transpiration ratio (Tr) and maximum velocity of carboxylation (Vc,max). Elevated [CO2] significantly increased leaf intrinsic efficiency of PSII (Fv’/Fm’) and quantum yield of PSII(WPSII), but decreased leaf non-photochemical quenching (NPQ), and did not affect leaf proportion of open PSII reaction centers (qP) and maximum quantum efficiency of PSII (Fv/Fm). The structural chloroplast membrane, grana layer and stroma thylakoid membranes were intact under elevated [CO2], though more starch grains were accumulated within the chloroplasts than that of under ambient [CO2]. While the yield of I. indigotica was higher due to the improved photosynthesis under elevated [CO2], the content of adenosine, one of the functional ingredients in indigowoad
root was not affected.

KeywordsAdenosine; Air; Biomass; Carbon Dioxide; Chlorophyll; Fluorescence; Isatis; Mesophyll Cells; Photosynthesis; Plant Leaves; Plant Roots
ANZSRC Field of Research 2020419999. Other environmental sciences not elsewhere classified
309999. Other agricultural, veterinary and food sciences not elsewhere classified
Byline AffiliationsShanxi Agricultural University, China
Chinese Academy of Agricultural Sciences, China
Institution of OriginUniversity of Southern Queensland
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