华北农学报2017，Vol.32Issue(6)：161-169,9.DOI:10.7668/hbnxb.2017.06.024
干旱胁迫对嫁接烤烟生长及生理特性的影响
Influence of Drought Stress on the Growth and Physiological Characteristics of the Grafting Flue-cured Tobacco
摘要
Abstract
In order to study the effect of drought stress on physiological characteristics of grafting flue-cured to-bacco,using KRK26 as scion, KRK26,K326 and Anyan 2 as rootstock,analysing and discussing root morphology, plant morphology and physiological indexes of resistance in pot culture under different treatment. The results indica-ted that under drought stress conditions at early period, the relative content of chlorophyll ( SPAD readings) de-creased, while the content of proline, superoxide dismutase ( SOD) activities, catalase ( CAT) activities and per-oxidase (POD) activities in flue-cured tobacco demonstrated an increasing trend. The root length,surface area, plant height,stem girth, node spacing and LAI of the grafted tobacco plants showed a decreasing trend,the content of proline continued to increase in both grafted seedlings and non-grafted seedlings with the aggravation of drought stress when tobacco leaves were turning to mature, whereas, the SPAD readings, SOD activities, CAT activities and POD activities all demonstrated a decreasing trend. The speed of decreasing in different root grafted was slower than that in own root grafted. Compared with KRK26/K326 and KRK26/KRK26, KRK26/Anyan 2 had greater pa-rameters under drought stress, but the SPAD readings did not have significant difference. All the results showed that less damage was made to KRK26/Anyan 2 than KRK26/K326 and KRK26/KRK26 under drought stress, and KRK26/KRK26 suffered the most serious damage. According to correlation analysis, there was a certain correlation between morphological indexes and resistance indexes of grafting flue-cured tobacco. In conclusion, there were ob-vious differences among grafted tobacco in physiological characteristics, and there response to soil drought. The or-der of drought resistance was KRK26/Anyan 2, KRK26/K326 and KRK26/KRK26 in turn from strong to weak, based on the main root morphology,plant morphology,physiological characteristics under drought stress.关键词
嫁接/干旱胁迫/酶活性/烤烟/抗旱性Key words
Grafting/Drought stress/Enzyme activity/Flue-cured tobacco/Drought resistance分类
农业科技引用本文复制引用
谢冰,向金友,饶在生,曹跃强,唐明,袁继超,易蔓..干旱胁迫对嫁接烤烟生长及生理特性的影响[J].华北农学报,2017,32(6):161-169,9.基金项目
四川省烟草专卖局(公司)项目(川烟科[2014]6号) （公司）
