Chin J Plan Ecolo ›› 2014, Vol. 38 ›› Issue (8): 878-888.doi: 10.3724/SP.J.1258.2014.00082

• Research Articles • Previous Articles     Next Articles

Growth and reproductive strategies of Thalictrum petaloideum under different stocking rates

QIAO Li-Qing1,2, TIAN Da-Shuan2, WAN Hong-Wei2, BAOYIN Taogetao1*, and PAN Qing-Min2*   

  1. 1College of Life Science, Inner Mongolia University, Hohhot 010021, China;

    2State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
  • Received:2014-04-15 Revised:2014-06-25 Online:2014-08-18 Published:2014-08-01
  • Contact: BAOYIN Taogetao, PAN Qing-Min E-mail:pqm@ibcas.ac.cn

Abstract:

Aims Grazing is one of the major measures for grassland management in Nei Mongol steppe. The growth and reproductive strategies of grassland plants are developed under their long-term co-evolution with ungulates in grassland ecosystems. This study was conducted to understand how Thalictrum petaloideum would change its growth and reproductive strategies with increasing stocking rate.
Methods By using a grazing experiment in a typical steppe ecosystem initiated by the Nei Mongol Grassland Ecosystem Research Station in 2006, we examined the responses of T. petaloideum to stocking rates at population, individual and organ levels during the 2012 and 2013 growing seasons.
Important findings With increasing stocking rate, the number of reproductive individuals decreased and the reproductive process ceased in T. petaloideum at the population level. The threshold for ceasing the reproductive process was at a stocking rate of 7.5 sheep per hm2. The plant height, plant biomass and the numbers of reproductive branches, flowers and seeds all decreased with increasing stocking rate at an individual level. Two shifts were detected for the reproductive allometric relationships with increases in stocking rate. With the increase of stocking rates, T. petaloideum reduced the number of flowers per reproductive branch decreased but the individual seed weight increased with increasing stocking rate at the organ level. A trade-off between the number of seed and the weight of seed was found, which might be an important mechanism in T. petaloideum responding to grazing disturbance.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Yang Jun and Yu Bing-gao. Comparison between Effects of L-arginine and Spermine Retarding Senescence of Excised Barley Leaves[J]. Chin Bull Bot, 1989, 6(03): 156 -160 .
[2] Dan Jiang;Yinxin Li *;Lingfeng Huang;Fanrong Zeng;Yuke Zhang . Effects of Salinity and Temperature on Introduction and Cultivation of the Euhalophyte Salicornia bigelovii Torr. in the Xiamen Ambient Sea[J]. Chin Bull Bot, 2008, 25(05): 533 -542 .
[3] Li Hai-tao and Chen Ling-zhi. A Introduction to the Heat-Pulse Technique and Its Application to Measuring the Stem-Sapflow in Trees[J]. Chin Bull Bot, 1997, 14(04): 24 -29 .
[4] Wu Zhao-ming Wang Quan-qiu Gao Xiao-xia and Xu Rong. Effect of Lanthanum and Cerium on the Activity of Glutamic-Pyruvic Transminase and Glutamate Dehydrogenase[J]. Chin Bull Bot, 1997, 14(增刊): 64 -67 .
[5] Xu Feng;Mou Ji-ping and Liang Sheng-ye. Wood Anatomy of the Bhesa-New Recorded Genus of Chinese Celastraceae[J]. Chin Bull Bot, 1990, 7(03): 52 -53 .
[6] RUAN Qi-Ping ZHOU Li ZHENG Yuan-Qi. Advance in the Reseach of olygalacturonase_inhibiting Proteins on Disease_Resistance of Plants[J]. Chin Bull Bot, 2000, 17(01): 60 -63 .
[7] Lina Qu Qiuyu Wang Chuanping Yang. Species-specific Identification of Larix gmelini, L. olgensis and L. principis-rupprechtii by RAPD Markers[J]. Chin Bull Bot, 2007, 24(04): 498 -504 .
[8] . [J]. Chin Bull Bot, 1994, 11(专辑): 62 .
[9] Shang Liu Xiangru Liao Jianguo Zhang Huijuan Miao. Purification of an Antifreeze Protein from Ligustrum lucidum Leaves and Its Partial Characteristics[J]. Chin Bull Bot, 2007, 24(04): 505 -510 .
[10] Li Mao-xue. The Problems of Chinese Translation and Nomenclature on Centromere and Kinetochore[J]. Chin Bull Bot, 1990, 7(02): 34 -36 .