Effects of Cadmium Stress on Agronomic Traits and Physiological and Biochemical Indexes of Flue-Cured Tobacco
In order to clarify the effects of heavy metal (Cd) stress on agronomic traits and physiological and biochemical indexes of flue-cured tobacco,the agronomic traits and physiological and biochemical indexes were determined under different concentration Cd stress for cultivated species Jiyan 9 of flue-cured tobacco using potting method in the experiment.The results showed that,leaf length,leaf width,plant height and stem circumference decreased when Cd ＞ 3mg/kg (except the leaf width of Cd20 treatment).The activity of catalase (CAT) and superoxide dismutase (SOD) increased first and then decreased with the increase of Cd concentration,which was opposite to the content of proline (Pro).The activity of peroxidase (POD) and content of Malondialdehyde (MDA) increased while the content of chlorophyll (Chl) decreased continuously,the content of total nitrogen,protein,total sugar and reducing sugar increased first and then decreased but then increased again with the increase of Cd concentration.The content of nicotine decreased with the increase of Cd concentration.
Flue-cured tobaccoCd stressAgronomic traitsPhysiological and biochemical indexes
NETL
NSTL
万方数据
维普
