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Fluctuation of Vegetative Storage Proteins in the Seedlings of Swietenia macrophylla, Analogous to the Seasonal Changes of Those in the Shoot of the Adult Tree

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Journal of Integrative Plant Biology 2007年第3期49卷 362-367页

作者： Ya-Qin Han Xing-Fu Yan Hua Zhang Zheng-Hai Hu Bing-Zhong Hao Wei-Min Tian Key Laboratory of Ministry of Agriculture for Tropical Crop Physiology Rubber Research Institute Chinese Academy of Tropical Agricultural Sciences Danzhou 571737 China College of Horticulture Shandong Agricultural University Tai'an 271018 China Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Institute of Botany Northwest University Xi'an 710069 China

In order to Identify appropriate plant materials for studying the gene expression and biological function of vegetative storage proteins （VSPs） in woody plants, the VSPs in the seedlings of Swietenla rnacrophylla King were investigated by using light microscopy, sodium dodecyl sulfate-polyacrylamide gel electrophoresis （SDS-PAGE） and ***. The seed of S. macrophylla was rich in storage proteins that accumulated In the vacuoles of cotyledon parenchyma cells in appearance of compact spherical grains. The growth and development of S. macrophylla seedlings were characterized by an obvious growth rhythm. The storage proteins In seeds disappeared during seedling growth while VSPs appeared in the stem 2 weeks after seedling leaves matured. Thereafter, the VSPs In the seedling stem almost exhausted during new shoot growth, and when the leaves of new shoot Just matured, both the stem beneath the new shoot of seedlings and the stem of new shoot started to accumulate VSPs. Nitrogen application dramatically Increased the level of VSPs, but had little influence on the dynamics of VSP consumption and accumulation in seedling stem. Together with these data, the fluctuation of VSPs in seedlings was very similar to that in the branches of the adult trees. In addition, seedlings are easy to be treated due to their small size. Our results suggested that S. rnacrophylla seedlings were suitable for Investigating the biological roles of VSPs and the mechanism of nitrogen storage in trees.

关键词： rhythmical growth seedlings Swietenia macrophylla King vegetative storage proteins

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