NDLI: Adaptability to elevated temperature and nitrogen addition is greater in a high-elevation population than in a low-elevation population of Hippophae rhamnoides

Content Provider	Springer Nature Link
Author	Li, Yan Zhao, Hongxia Duan, Baoli Korpelainen, Helena Li, Chunyang
Copyright Year	2011
Abstract	Hippophae rhamnoides L. is a broadleaf deciduous woody shrub occurring in southwest China, where it has been widely used in ecological restoration. In this study we investigated growth and physiological responses of 2-year-old healthy seedlings to elevated temperature, nitrogen (N) addition and their combination in two contrasting populations from high and low elevations. In closed-top chamber experiments, two populations were subjected to two temperature conditions (ambient temperature and temperature elevated by 2.2 ± 0.2°C) and two N levels (0 and 25 g N m−2 a−1). Compared with the control, increases in total leaf area (TLA), total chlorophyll content (TC), light-saturated photosynthetic rate (P max), guaiacol peroxidase activity (POD), catalase activity (CAT) and carbon isotope composition (δ13C) were greater in the high-elevation population than in the low-elevation population under elevated temperature. On the other hand, decreases in root and shoot biomass ratio (RS), TC, P max, light saturation point (L SP), light compensation point (L CP), superoxide dismutase (SOD), POD, CAT and δ13C were lower in the high-elevation population than in the low-elevation population under N addition. Moreover, the combination of elevated temperature and N addition decreased RS, P max, apparent quantum efficiency (Φ), SOD, POD and δ13C significantly more in the low-elevation population than in the high-elevation population. These results demonstrated that there are different adaptive strategies among H. rhamnoides populations, the high-elevation population exhibiting higher adaptability to elevated temperature and N addition than the low-elevation population.
Starting Page	1073
Ending Page	1082
Page Count	10
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	25
Issue Number	6
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-06-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Antioxidant enzymes Chlorophyll pigments Gas exchange Growth responses Water use efficiency Plant Sciences Agriculture Plant Physiology Plant Pathology Plant Anatomy/Development Forestry
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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