NDLI: Effects of elevated CO$_{2}$ on leaf area dynamics in nodulating and non-nodulating soybean stands

Content Provider	Springer Nature Link
Author	Oikawa, Shimpei Okada, Masumi Hikosaka, Kouki
Copyright Year	2013
Abstract	The effects of elevated CO$_{2}$ on leaf area index (LAI) vary among studies. We hypothesized that the interactive effects of CO$_{2}$ and nitrogen on leaf area loss have important roles in LAI regulation.We studied the leaf area production and loss using nodulating soybean and its non-nodulating isogenic line in CO$_{2}$-controlled greenhouse systems.Leaf area production increased with elevated CO$_{2}$ levels in the nodulating soybean stand and to a lesser extent in the non-nodulating line. Elevated CO$_{2}$ levels accelerated leaf area loss only in nodulating plants. Consequently, both plants exhibited a similar stimulation of peak LAI with CO$_{2}$ elevation. The accelerated leaf loss in nodulating plants may have been caused by newly produced leaves shading the lower leaves. The nodulating plants acquired N throughout the growth phase, whereas non-nodulating plants did not acquire N after flowering due to the depletion of soil N. N retranslocation to new organs and subsequent leaf loss were faster in non-nodulating plants compared with nodulating plants, irrespective of the CO$_{2}$ levels.LAI regulation in soybean involved various factors, such as light availability within the canopy, N acquisition and N demands in new organs. These effects varied among the growth stages and CO$_{2}$ levels.
Starting Page	627
Ending Page	639
Page Count	13
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	373
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-07-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Leaf area index (LAI) Leaf senescence Legumes Symbiotic N$_{2}$-fixation Nitrogen demand Nitrogen retranslocation Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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