NDLI: Stable carbon isotope characteristics of desert plants in the Junggar Basin, China

Content Provider	Springer Nature Link
Author	Ma, Jian Ying Sun, Wei Sun, Hui Ling Wang, Shao Ming
Copyright Year	2011
Abstract	Desert plants have unique strategies for survival and growth to cope with the limited water availability in arid regions. The stable carbon isotope (δ $^{13}$C) provides an integrated measurement of internal plant physiological and external environmental properties affecting photosynthetic gas exchange and water use efficiency. The δ $^{13}$C values of 84 species in the Junggar Basin were categorized into two groups (ranged from −30.1 to −23.3‰ for C$_{3}$ and −14.9 to −9.9‰ for C$_{4}$ species, respectively). No life form differences in δ $^{13}$C values were detected in C$_{3}$ (p = 0.78) and C$_{4}$ plants (p = 0.63). Small differences among life forms were observed in δ $^{13}$C values in C$_{4}$ species with shrubs slightly depleted (−13.3‰) relative to perennials (−13.1‰) and annuals (−12.5‰). These differences suggested that δ $^{13}$C value could not represent a plant functional group classification based on life forms in C$_{4}$ plants in extremely arid regions. Ephemerals are all using C$_{3}$ photosynthetic pathway and no significant differences (p = 0.92) in δ $^{13}$C values were observed between annuals (−26.5‰) and perennials (−26.4‰). The δ $^{13}$C values of Tulipa iliensis (an important ephemeral species distributed widely in the Junggar Basin) among nine natural populations were positively correlated with leaf (r $^{2}$ = 0.46, p = 0.046) and soil (r $^{2}$ = 0.67, p = 0.007) total nitrogen content, and negatively correlated with leaf (r $^{2}$ = 0.48, p = 0.039) and soil (r $^{2}$ = 0.79, p = 0.001) water content. This indicated that the variation in δ $^{13}$C values of T. iliensis was probably caused by both water availability associated stomatal openness and nitrogen availability associated photosynthetic capacity. T. iliensis is very sensitive to water and nitrogen availability in soil.
Starting Page	115
Ending Page	124
Page Count	10
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	27
Issue Number	1
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2011-09-06
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	δ $^{13}$C Ephemerals Tulipa iliensis Soil factors Junggar Basin Ecology Zoology Forestry Plant Sciences Evolutionary Biology Behavioural Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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