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Author Yi-Ming, Lin ♦ Zai-Qing, Peng ♦ Peng, Lin
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Leaf Senescence ♦ Element Retranslocation Efficiency ♦ Leaf Area ♦ Leaf Mass ♦ Phyllostachys Pubescens ♦ Different Base ♦ Gram Leaf Dry Weight ♦ Mean Re ♦ Mg Element ♦ Mg Element Cm2 Leaf ♦ Decrease Percentage ♦ Seasonal Change ♦ Leaf Weight ♦ Certain Mass ♦ Area Ratio ♦ Mg Element Leaf ♦ Mean Decrease ♦ Specific Leaf Mass ♦ Key Word ♦ Rank Order ♦ Phyllostachys Pubescens Mazel Ex
Abstract Abstract: Dynamics of leaf mass (LM), leaf area (LA) and element retranslocation efficiency during leaf senescence was investigated in Phyllostachys pubescens Mazel ex H. de Lehaie in Yongchun, Fujian, China. Comparison of differences in element retranslocation efficiencies (RE) based on per gram leaf dry weight, per leaf and per LA during leaf senescence was carried out. With leaf senescence, the mean decreases of LM, LA and specific leaf mass (SLM) were 19.55%, 15.16 % and 5.07%, respectively. The seasonal changes in decrease percentage of LM and LA were similar, indicating that certain mass to area ratios occurred in P. pubescens leaves. On different bases, RE of N and K was positive, while RE of Ca was negative, suggesting that with leaf senescence, N and K were translocated out of senescing leaves to other parts of plant, while Ca accumulated in senescing leaves. For the mean RE of N, P, K, Ca and Mg on different bases, the rank order was RE2 (mg element/leaf)>RE3 (mg element/cm2 leaf)>RE1 (mg element/g), therefore, RE on the basis of leaf weight or LA would be underestimated. Key words: Phyllostachys pubescens; leaf mass (LM); leaf area (LA); element retranslocation efficiency; leaf senescence Retranslocation from senescing leaves is the process by which plants withdraw elements from these leaves, mak-
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2004-01-01