| 引用本文: | 甄 博,郭相平,陆红飞,等.分蘖期旱涝交替胁迫对水稻生理指标的影响[J].灌溉排水学报,2017,36(5):. |
| ZHEN Bo,GUO Xiangping,LU Hongfei,et al.分蘖期旱涝交替胁迫对水稻生理指标的影响[J].灌溉排水学报,2017,36(5):. |
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| 摘要: |
| 采用盆栽试验，以常规灌溉为对照（CK），研究了水稻在分蘖期轻度旱涝交替胁迫（T-LD）和重度旱涝交替胁迫（T-HD）前、后及复水后各个生育期的部分生理指标变化，以探讨旱涝交替胁迫对水稻生长影响的机理。结果表明，T-LD处理的水稻叶片硝酸还原酶（NR）活性显著高于T-HD处理和CK；与CK相比，旱涝交替胁迫处理显著降低了水稻叶片中丙二醛（MDA）的质量摩尔浓度和谷氨酰胺合成酶（GS）活性，显著增加了水稻叶片中叶绿素总量；复水后（黄熟期）GS活性均明显提高并高于CK。说明分蘖期旱涝交替胁迫可以增强水稻叶片的生理活性，延缓叶片衰老，不会降低水稻后期的耐淹能力。 |
| 关键词: 旱涝交替胁迫； 水稻； 分蘖期； 生理指标； 耐淹能力 |
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| Impact of Alternating Drought and Waterlogging during Tillering Stage on Physiological Traits of Rice |
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ZHEN Bo, GUO Xiangping, LU Hongfei, ZHOU Xinguo, WANG Zhenchang, LI Xiaopu
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Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
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| Abstract: |
| This paper investigated the impact of alternating waterlogging and drought during the tillering stage on physiological traits of rice using pot experiments. We considered both slight waterlogging-drought alternation (T-LD) and severe waterlogging-drought alternation (T-HD). Main physiological traits were measured before, during and after occurrence of these stresses. The results showed that the activity of nitrate reductase in the leaves under T-LD was higher than those under T-HD and CK (conventional flooding). In comparison with those under CK, the concentration of malondialdehyde and the activity of glutamine synthetase (GS) under T-LD and T-HD decreased significantly, while the concentration of chlorophyll increased. At ripening stage after re-watering, the activity of GS increased considerably and was higher than that under the CK, indicating that a moderate waterlogging-drought alternation during tillering stage can enhance physiological activity of the rice and delayed senescence without scarifying tolerance of the rice to flooding. |
| Key words: alternative drought and waterlogging; rice; tillering stage; physiological traits; submergence tolerance |
