不同土壤含水量下沙棘叶片解剖结构研究

doi:10.12190/j.issn.2096-1197.2023.02.09

Abstract

Abstract: 【Objective】To study the anatomical leaf structure of seabuckthorn under different soil moisture contents and to provide basis for further research on drought and waterlogging tolerance mechanism of seabuckthorn.【Methods】Drought and waterlogging treatments were set up using one-year Chinese seabuckthorn cuttings as experimental materials,with conventional irrigation as control（CK）. Under different soil moisture contents,the changes in the anatomical structure of young and old leaves were observed through paraffin sectioning.【Results】Under drought conditions,the leaf blade,epidermis and palisade tissue of seabuckthorn young leaves significantly thickened（P<0.05）. The thickness of leaf blade,lower epidermis and palisade tissue of old leaves were not significantly different from that of CK（P>0.05）,while the upper epidermis and spongy tissue significantly thickened（P<0.05）. In comparison with CK,the young leaf palisade to spongy ratio and leaf cell tense ratio （CTR） increased,while the leaf spony ratio（SR） decreased,with old leaves showing the reverse trend. The young leaf vein,vascular bundle and xylem maximal vessel diameter were not significantly different from those of CK（P>0.05）,while those of the old leaves significantly thickened（P<0.05）. Under waterlogging conditions,seabuckthorn young leaves became thinner. There was no significant difference between the thickness of old leaves and CK（P>0.05）. In comparison to the CK,both the young and old leaves had thinning palisade tissue,thickening spongy tissue,decreased palisade to spongy ratio and CTR,and increased SR. There was no significant difference in the main vein and xylem maximal vessel diameter between young leaves and CK（P>0.05）,the vascular bundle diameter decreased significantly（P<0.05）,while all of those in the old leaves increased significantly（P<0.05）.【Conclusion】Seabuckthorn young leaves near the top growth point adapted to different water conditions by adjusting mesophyll structure,while old leaves near the stem base adapted to different water conditions by adjusting leaf vein vascular tissue.

Key words: Soil moisture content, Seabuckthorn, Leaf blade, Anatomical structure

CLC Number:

S793.6

CUI Xiaohan, YE Lihong, JIA Wenlong, DONG Baozhu, ZHANG Min, SONG Yang. Study on seabuckthorn leaf anatomical structure under different soil moisture contents[J].Journal of Northern Agriculture, 2023, 51(2): 74-82.

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URL: https://journal30.magtechjournal.com/bfnyxb/EN/10.12190/j.issn.2096-1197.2023.02.09

https://journal30.magtechjournal.com/bfnyxb/EN/Y2023/V51/I2/74

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Study on seabuckthorn leaf anatomical structure under different soil moisture contents

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