| Effects of water on root physiological characteristics at seedling stage and yield of different tartary buckwheat |
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| DOI：10.7606/j.issn.1000-7601.2018.02.19 |
| Key Words: buckwheat drought stress the root system physiological indexes production |
| Author Name | Affiliation | | LU Zhi-juan | College of Life Sciences, Shanxi Normal University, Linfen, Shanxi 041004, China | | ZHANG Yong-qing | College of Life Sciences, Shanxi Normal University, Linfen, Shanxi 041004, China
College of Geographical Sciences， Shanxi Normal University， Linfen, Shanxi 041004, China | | ZANG Chu | College of Life Sciences, Shanxi Normal University, Linfen, Shanxi 041004, China | | LIU Li-qin | College of Life Sciences, Shanxi Normal University, Linfen, Shanxi 041004, China |
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| Abstract: |
| The effects of three different water stresses on the physiomorphological characteristics and root associated physiological characteristics of the tartary buckwheat (‘DiQing’, ‘Yunqiao1 ’, and ‘Duoyuan’) during the seedling stage were studied in a pot experiment. The results showed that: (1) With aggravation of water stress， Testing varietiess' seedling plant height, stem diameter, leaf area, shoot dry weight, total root volume, total root area, chlorophyll content, leaf relative water content and potential activity of PSII Fv/Fo and the maximal photochemical efficiency of Fv/Fm, root activity and soluble protein content declined, but the drop is different, is shown as: Duoyuan＞Yunqiao1＞DiQing. (2) Root/shoot ratio, root SOD, POD activity, root MDA, Content of proline and soluble sugar with deepening of drought stress is on the rise, is shown as: DiQing＞Yunqiao1＞Duoyuan. Maximum root length under moderate stress has a trend of elongation， but three varieties were depressed at the influence of severe stress, and the depression of DiQing is most smallest. (3) With aggravation of water stress, branches of main stem、grains per plant、100-seed mass of tested varieties declined at mature stage, Grains per plant was most obvious. Analysis showed that， under the drought stress, whether the obvious morphological indices，root SOD，POD that scavenging free radical and yield at mature stage etc., Pingqiao2 all have a good performance, prominent superiority. In short, DiQing under drought stress has a stronger ability to adapt, worst drought resistance of Duoyuan, Yunqiao1 belong to the intermediate type. |
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