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《Acta Botanica Boreali-Occidentalia Sinica》 2010-08
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Comparison of Micro-structures of Leaves between Standard and Dwarf Pears

GE Hong-juan,LIANG Mei-xia,DAI Hong-yi(College of Landscaping and Horticulture,Qingdao Agricultural University,Qingdao,Shandong 266109,China)  
Dwarf and standard pears were used to compare the micro-structures of leaves by means of paraffin section and scanning electron microscopy(SEM).The results showed that there were significant differences in micro-structures of leaves between the standard and dwarf pears.There were lots of waxy substances on the upper epidermis of both standard and dwarf pears,and the stomata were only found on lower epidermis.The average major axis and minor axis of stomatum apparatus of standard and dwarf pears were 25.42 μm×19.39 μm and 29.52 μm×16.85 μm respectively.The average length and width of stomata were 17.73 μm×5.37 μm and 20.59 μm×4.07 μm respectively.The average thickness of leaves of standard and dwarf pears were 196.35 μm and 227.99 μm respectively,and the thickness of palisade tissue were 54.93 μm and 79.13 μm respectively.The average palisade/sponge of standard and dwarf pears were 0.80 and 1.16,respectively.The differences in microstructure from the leaves indicated that dwarf pears have stronger drought and cold tolorance.
【Fund】: 山东良种产业化工程项目
【CateGory Index】: S661.2
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