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Acta Prataculturae Sinica ›› 2013, Vol. 22 ›› Issue (1): 10-19.

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Influence of altitude on reproductive traits and reproductive allocation of different colours in Anemone obtusiloba populations

LI Bing1, LIU Zuo-jun1, ZHAO Zhi-gang2, HU Chun1, REN Hong-mei1, WU Guo-qiang1   

  1. 1.School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2.Key Laboratory of Arid and Grassland Ecology with the Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • Received:2011-12-27 Online:2013-01-25 Published:2013-02-20

Abstract: Reproductive traits and reproductive allocation of three colours in Anemone obtusiloba at four different altitudinal gradients in the eastern Qinghai-Tibetan Plateau were examined. 1) With increased altitude, the investment proportion of the three flower colours of A. obtusiloba all increased in flowers but decreased in leaves. 2) Flower numbers of A. obtusiloba in all three colours decreased with an increase of altitude; but single flower area, single flower weight, floral display area and reproductive allocation all increased. 3) In the four altitudinal gradients,the individual size of the same colour flowers was significantly positively correlated with flower number, single flower weight, floral display area and reproductive investment. The single flower area was also positively correlated with other aspects, and showed that the altitude directly affected these reproductive traits. There was no significant correlation between reproductive allocation and individual size of the same colour flowers of A. obtusiloba. All these results suggest that there is an important effect of altitude on reproductive traits and reproductive allocation to different colours of A. obtusiloba. These reproductive colour traits and allocation of A. obtusiloba all increased reproductive fitness with an increase of altitude, but the altitude could not fully explain the change of resource allocation strategy of this alpine perennial.

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