NDLI: Photosynthetic response of soybean to L-DOPA and aqueous extracts of velvet bean

Content Provider	Springer Nature Link
Author	Marchiosi, Rogério Souza Bido, Graciene Böhm, Paulo Alfredo Feitoza Soares, Anderson Ricardo Silva, Hingrid Ariane Ferro, Ana Paula Lourdes Lucio Ferrarese, Maria Ferrarese Filho, Osvaldo
Copyright Year	2016
Abstract	L-3,4-Dihydroxyphenylalanine (L-DOPA) is an allelochemical released by roots of velvet bean (Mucuna pruriens) that affects the growth of several plant species. However, its mechanism of action is inconclusive. In this work, we compared the effects of L-DOPA (0.01–1.0 mmol L−1) and of aqueous extracts (300, 1200, and 3000 mg L−1) of velvet bean on growth and photosynthesis (gas exchange and chlorophyll a fluorescence) of soybean (Glycine max). Overall, the results showed that both L-DOPA and aqueous extracts of velvet bean reduced the growth, leaf area, photosynthetic rate (A), stomatal conductance (gs), transpiration (E), and quantum yield of electron flow through photosystem II (PSII) in vivo (ΦF). In addition, L-DOPA and aqueous extracts increased the internal CO2 concentration (Ci) and the leaf wax and trichome density on the leaf surface, while the maximum quantum yield of PSII (Fv/Fm) was not changed. These results suggest that the reduction of A should not be related exclusively to the stomatal closure, but also to limitations of the carbon metabolism, as indicated by the increase of Ci and decrease of ΦF. Briefly, we concluded that soybean growth inhibition by L-DOPA and aqueous extracts of velvet bean is due to the combination of damage in the root meristem and reduction in A.
Starting Page	171
Ending Page	182
Page Count	12
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	80
Issue Number	2
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-02-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Stomatal limitation to photosynthesis Non-stomatal limitation to photosynthesis Chlorophyll fluorescence Gas exchange Soybean growth-inhibition L-3,4-Dihydroxyphenylalanine Plant Sciences Plant Anatomy/Development Plant Physiology Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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