Changes in the Vascular Cylinder of Wild Soybean Roots Under Alkaline Stress |
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| Authors: | NIU Lu ;LU Jing-mei ;WU Dong-mei ;LI Yan ;GAO Ting-ting |
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| Institution: | 1、School of Life Sciences, Northeast Normal University, Changchun 130024, P.R.China
2、Qinghai Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation, Northwest Institute of Plateau Biology, Chinese Academy
of Sciences, Xining 810008, P.R.China |
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| Abstract: | Changes in the vascular cylinder of wild soybean (Glycine soja Sieb. et Zucc) roots under alkaline stress were investigated in an experiment that applied 90 mmol L?1 alkaline stress for 10 d at the five-trifoliate plant growth stage in Huinan County, Jilin Province, China. Root samples were collected and paraffin-cut sections were made, and the root structure was observed under an optical microscope. There were significant changes in the vascular cylinder of G. soja roots under alkaline stress. Root diameter was reduced and the vascular cylinder changed from tetrarch to triarch pattern. Alkaline stress resulted in reduced, diameters of root vessels, and a large amount of residual, alkaline solution was stained cyaneous in vessels. The paratracheal parenchymatous cells of the vessels were large and there was little secondary xylem. Thus, alkaline stress caused structural changes in the vascular cylinder of G. soja. |
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| Keywords: | Glycine soja Sieb et Zucc alkaline stress anatomical structure tetrarch condition of vascular cylinder triarchcondition of vascular cylinder |
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