植物研究2012，Vol.32Issue(2)：165-170,6.
5个油松种源光合特性的比较研究
Comparison of Photosynthesis Characteristics in Five Provenances of Chinese Pine(Pinus tabulaeformis Carr.)
摘要
Abstract
In order to reveal the photosynthetic characteristic variations of different provenances and provide the theoretical basis for the work of provenance selection, the seedlings of Chinese pine ( Pinus tabulaeformis Carr. ) from five provenances, including provenances Luonan (LN) and Huangling (HL) from Shaanxi, Lvliang Mountain (LL) and Lingkong Mountain (LK) from Shanxi and Qian Mountain (QM) from Liaoning were planted in Loess Plateau. The photosynthetic parameters and their correlations to environmental factors were studied with Li-6400 portable photosynthesis system under natural condition in order to reveal the mechanism of adaptation of different provenances. The results indicted that the diurnal dynamics of net photosynthetic rate (Pn) , transpiration rate (Tr) and stomatal conductance ( Gs) for five provenances were double-peak curves with obviously midday depression in Pn. The water use efficiency ( WUE) of porvenance QM had only one peak, while those of provenances LN, LL, LK and HL had two peaks. The first peaks for all provenances occurred at 8:00 or 10:00, and the second peaks of provenances LN, LL, LK and HL occurred between 12:00 and 16:00. Based on the tendency of changes in Pn, Gs, intercellular CO2 concentration ( Ci) and stomatal limitation ( Ls) , we speculate that the midday depressions of provenance HL was not controlled by stomatal factors, while those of the other four provenances were. The daily mean values of Pn, Tr and WUE for provenance LK was the highest and those for provenance HL was lower than the other provenances. The correlation analyses showed that the main factors affecting Pn were air temperature (Ta) and vapour pressure deficit (VPD). The main factor affecting Tr was relative humidity ( RH ) for provenances LN, LL and LK, while for provenances HL and QM, the main factors were Ta and VPD.关键词
净光合速率/蒸腾速率/水分利用效率/油松种源Key words
net photosynthetic rate/transpiration rate/water use efficiency/provenance of Pinus tabuleformis分类
农业科技引用本文复制引用
狄晓艳,池喜梅,陈建文,王孟本..5个油松种源光合特性的比较研究[J].植物研究,2012,32(2):165-170,6.基金项目
国家自然科学基金(31070459)、山西省自然科学基金(2007021032,2011011030-2)和山西省留学回国人员科技活动择优资助项目 （31070459）
