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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (2): 201-211.doi: 10.7525/j.issn.1673-5102.2018.02.006

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Effects of Growth Environment and Tree Age on Biomass Allocation within Fruit Twigs of Fengdan(Paeonia ostii)

MA Han-Ze1, WANG Cheng-Zhong1,2,3, LI Ding1, FAN Guo-Zhen1, HU Yong-Hong3, SONG Zhi-Ping1   

  1. 1. Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai 200438;
    2. Suzhou Polytechnic Institute of Agriculture, Suzhou 215008;
    3. Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, CAS, Shanghai Chenshan Botanical Garden, Shanghai 201602
  • Received:2017-07-31 Online:2018-03-15 Published:2018-03-23
  • Supported by:
    The Special Fund of Shanghai Chenshan Botanical Garden(shcs13-1047)

Abstract: Biomass allocation is critical for understanding the yield formation of crops. Fengdan is the cultivated type originated from Paeonia ostii and the predominant variety of oil tree Paeonia that is newly cultivated as one of the oil tree crops in China. In order to examine the effects of growth environment and tree age on twig vegetative and reproductive growth, we compared the biomass characteristics of fruit twigs among eight 6-year-old Fengdan populations from different sites and that between 4, 6 and 8-year populations cultivated at Shanghai, and Tongling of Anhui Province. The number of fruit twigs increased with age increase, while there was no significant difference of twig growth and reproduction between different aged populations, indicating age effects existed at individual level but not twig level. There were significant correlations between the trait measurements, whereas, such correlations varied among populations. The body sizes and biomass allocations of fruit twigs were different among different populations, and the variations of biomass allocation associated with environmental variables. By allometric relationship modeling analysis, the fruit twigs from most of populations displayed constant biomass allocation between growth and reproduction functions(slope=1) with varied intercepts among populations. Therefore, the cultivation environment has significant effects on the growth and reproduction of Fengdan.

Key words: fruit twig, biomass allocation, tree age, allometric relationship, Fengdan (Paeonia ostia)

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