JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2016, Vol. 51 ›› Issue (5): 29-35.doi: 10.6040/j.issn.1671-9352.0.2015.265

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Growth and physiological changes during plant senescence of ancient Pinus tabulaeformis Carr.

WANG Qiao1,2, ZHU Hong1,2, WANG Hua-tian1,2*, MENG Xian-Peng3,CAO Gui-ping3, LI Jian3, HUANG Chang-bao3   

  1. 1. Key Laboratory of Silviculture of Shandong Province, Taian 271018, Shandong, China;
    2. Taishan Forest Ecological Research Station of the State Forestry Administration, Taian 271018, Shandong, China;
    3. Taishan Scenic Area Management Committee, Taian 271000, Shandong, China
  • Received:2015-06-01 Online:2016-05-20 Published:2016-05-16

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Abstract: In order to provide scientific basis of the vigor diagnosis and their rejuvenation and management to anti-aging, the growth and physiological diagnosis indices of the young healthy trees and senescence ancient pines were investigated. The annual pine needles from healthy and weak pines with different ages in the Taishan National Park were used as materials. The shoot length, needle length and coarseness, chlorophyll content, membrane permeability, net photosynthetic rate(Pn), transpiration rate(Tr), stomatal conductance(Gs), intercellular CO2 concentration(Ci), mineral elements content of C, N, P, K and Mg, abscisic acid(ABA)content of pine needles were measured. The results showed that, comparing with healthy pines, the ancient ones had thinner, shorter needles and weaker photosynthetic capacity, lower growth of shoots, chlorophyll content and light use efficiency. Membrane permeability creased with membrane lipid peroxidation. There were no remarkable changes in P content and increased mineral elements content of C, 山 东 大 学 学 报 (理 学 版)第51卷 - 第5期王巧,等:油松古树衰老过程中的生长与生理变化 \=-N, Mg and K in senescing and weak ancient pines. Higher ABA content led to weakness of vigor. The correlation between morphological changes and physiological indexes were significant. It was summarized that growth and physiological indexes could be used as bases to diagnose the senescence and weakness of ancient pines.

Key words: senescence, growth, physiology, Pinus tabuliformis Carr.

CLC Number: 

  • S718.54
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