Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00468-018-1659-2 |
Photosynthetic acclimation of an evergreen broadleaved shrub (Ammopiptanthus mongolicus) to seasonal climate extremes on the Alxa Plateau, a cold desert ecosystem | |
Li, Zhengzhen1,2; Li, Ximeng3; Rubert-Nason, Kennedy F.2; Yang, Qiong4; Fu, Qiang1; Feng, Jinchao1; Shi, Sha1 | |
通讯作者 | Feng, Jinchao ; Shi, Sha |
来源期刊 | TREES-STRUCTURE AND FUNCTION
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ISSN | 0931-1890 |
EISSN | 1432-2285 |
出版年 | 2018 |
卷号 | 32期号:2页码:603-614 |
英文摘要 | Survival of Ammopiptanthus mongolicus in a cold desert environment is facilitated by high photosynthesis rates in spring and summer, and efficient photoprotective strategies in winter cold. Woody evergreen plants inhabiting cold desert ecosystems must retain their foliage amidst chronically dry conditions and large seasonal temperature variations. To understand the strategies enabling survival of evergreens in these environments, we monitored seasonal changes in foliar gas exchange and photosynthetic traits of Ammopiptanthus mongolicus, an evergreen broadleaved shrub native to the cold desert of northwestern China. We found that photosynthesis was relatively higher in spring and summer and lower in fall and winter. Transitioning from spring to summer, A. mongolicus maintained high photosynthetic capacity (A (max)). Transitioning into fall, the A (max) and maximum stomatal conductance (g (smax)) decreased, while the relative stomatal limitation to photosynthesis (L (s)) increased. In winter, A. mongolicus decreased A (max), maximum quantum efficiency of photosystem II (F (v)/F (m)), maximum RuBisCo carboxylation rates (V (cmax)), maximum RuBP regeneration rates (J (max)), and photosynthetic nitrogen-use efficiency (PNUEmax) relative to other seasons. Collectively, these results suggest that A. mongolicus adapts physiologically to maximize carbon assimilation during spring and summer, and to maximize foliar resistance to cold stress at the expense of photosynthesis in winter. Foliage was protected against photo-oxidative damage during temperature extremes in winter by dark-sustained thermal energy dissipation. Overall, our study reveals that multiple photosynthetic adjustments, varying among the seasons, enable the survival of cold desert evergreens. |
英文关键词 | Evergreen Abiotic stress Photosynthetic capacity Energy balance Nitrogen allocation |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA ; Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000427709200022 |
WOS关键词 | ELECTRON-TRANSPORT ; NITROGEN ALLOCATION ; LEAF RESPIRATION ; SCOTS PINE ; DROUGHT ; LEAVES ; PLANT ; STRESS ; C-3 ; TEMPERATURE |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/213504 |
作者单位 | 1.Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China; 2.Univ Wisconsin Madison, Dept Entomol, Madison, WI 53706 USA; 3.Western Sydney Univ, Hawkesbury Inst Environm, Sydney, NSW 2751, Australia; 4.Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Zhengzhen,Li, Ximeng,Rubert-Nason, Kennedy F.,et al. Photosynthetic acclimation of an evergreen broadleaved shrub (Ammopiptanthus mongolicus) to seasonal climate extremes on the Alxa Plateau, a cold desert ecosystem[J],2018,32(2):603-614. |
APA | Li, Zhengzhen.,Li, Ximeng.,Rubert-Nason, Kennedy F..,Yang, Qiong.,Fu, Qiang.,...&Shi, Sha.(2018).Photosynthetic acclimation of an evergreen broadleaved shrub (Ammopiptanthus mongolicus) to seasonal climate extremes on the Alxa Plateau, a cold desert ecosystem.TREES-STRUCTURE AND FUNCTION,32(2),603-614. |
MLA | Li, Zhengzhen,et al."Photosynthetic acclimation of an evergreen broadleaved shrub (Ammopiptanthus mongolicus) to seasonal climate extremes on the Alxa Plateau, a cold desert ecosystem".TREES-STRUCTURE AND FUNCTION 32.2(2018):603-614. |
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