Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets during development and senescence

Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets across a coastal gradient were studied at Chishan Forestry Center of Dongshan County, Fujian Province, China. (1) Total phenolics and protein precipitation capacity in young branchlets was sig...

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Bibliographic Details
Published in:Journal of forest research 2008-10, Vol.13 (5), p.302-311
Main Authors: Zhang, Li-Hua, Lin, Yi-Ming, Ye, Gong-Fu, Liu, Xiao-Wei, Lin, Guang-Hui
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Casuarina equisetifolia
Efficiency
Forestry
Forestry Management
Life Sciences
Nutrient cycles
Nutrient limitation
Nutrient resorption
Original Article
Phenols
Plant Ecology
Plant Sciences
Polyphenolics
Senescence
Tannins
Tree Biology
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Summary:Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets across a coastal gradient were studied at Chishan Forestry Center of Dongshan County, Fujian Province, China. (1) Total phenolics and protein precipitation capacity in young branchlets was significantly higher than in mature and senescent branchlets across a coastal gradient; extractable condensed tannin content was higher in young and mature branchlets than in senescent branchlets. Whereas protein-bound condensed tannins increased with senescence, fiber-bound condensed tannins fluctuated without a consistent pattern; (2) N and P concentrations at various stages of branchlet development across a coastal gradient followed the same order: young branchlets > mature branchlets > senescent branchlets; N:P ratio of young branchlets was the lowest, and increased with maturity and senescence across a coastal gradient; phosphorus resorption efficiency was significantly higher than nitrogen resorption efficiency among corresponding coastal gradients in response to P deficiency (high N:P ratio), but nutrient resorption efficiency was influenced by coastal gradients; (3) significant linear relationships between total phenolics and nutrient contents indicated that polyphenolics had a potential effect on nutrient cycling.
ISSN:1341-6979
1610-7403
DOI:10.1007/s10310-008-0081-9