| Leaf senescence and protective enzyme system of broomcorn millet under drought condition |
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| DOI：10.7606/j.issn.1000-7601.2010.02.20 |
| Key Words: broomcorn millet leaf senescence drought activity of protective enzyme |
| Author Name | Affiliation | | ZHANG Panpan | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | FENG Baili | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Pengke | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | GAO Xiaoli | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | TA Jumei | Foundation Seed Farm in Yulin, Yulin, Shaanxi 719000, China | | CHAI Yan | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | SONG Hui | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In three broomcorn millet varieties of Ningmi 13, Neimi 5 and Jinmi 4 which were planted in arid shed，chlorophyll contents, SOD, CAT, POD activities and MDA contents were analyzed after flowering under drought. The results showed that the chlorophyll contents, SOD, CAT and POD activities decreased gradually from 14 days after the varieties flowered, but MDA contents increased gradually as leaves senescence went on. Although the leaves of the var
ieties presented a similar tendency in their senescence, their senescence progresses differed significantly. Compared with Neimi 5 and Jinmi 4, the leaves of Ningmi 13 declined slowly in chlorophyll contents, SOD, and CAT activities, declined fast in POD activity, and increased slowly in MDA content, thus prolonging their function duration and slowing down the senescence of its leaves, which is conductive to the accumulation of photosynthate; Chlorophyll content, SOD and CAT activities had the positive correlation with yield per plant, but POD and MDA content had negative correlation with yield per plant under drought condition. |
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