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《Guihaia》 2010-03
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Morphological and developing characteristics of the young leaves in dormant buds of Magnolia grandi flora

ZHENG Xing-Feng,XU Xiao-Lin,SUN Jian-Xiu (College of Life Science,Xuzhou Normal University,Xuzhou 221116,China)  
Morphological and developing characteristics of dormant buds of Magnolia grandiflora were observed with anatomical methods.The results are as follows:most of the young leaves are erecting,while a few are spiraling;leaf blades are all conduplicate longitudinally along its middle veil with the lateral edges inwards,and among the buds of a single tree and the different trees stochastically to the right or left;the outer 1-3 layer leaves in a leaf bud and all ones in a flower bud are mostly dead;the petioles of the inmost layer young leaves in flower buds,are adnate to its stipules,with their blades in most cases degenerated away and occasionally developing into normal and smaller ones. It's considered that death of young leaves in the buds is physiologically degenerated for adaption,not caused by diseases or innutrition,which might have relevance to the substitution of stipules for young leaves as bud scales performing protectio in evolution.
【Fund】: 徐州师范大学博士启动基金(KY2004117);; 徐州师范大学自然科学基金(05XLB14)~~
【CateGory Index】: Q944
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