| 引用本文: | 甄博,周新国,陆红飞,等.高温与涝交互胁迫对水稻孕穗期生理指标的影响[J].灌溉排水学报,2019,38(3):1-7. |
| ZHEN Bo,ZHOU Xinguo,LU Hongfei,et al.高温与涝交互胁迫对水稻孕穗期生理指标的影响[J].灌溉排水学报,2019,38(3):1-7. |
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| 摘要: |
| 我国黄淮以南地区水稻易遭受高温与涝交互胁迫影响。【目的】充分利用雨水资源，降低面源污染，为暴雨后稻田恰遇高温时排水管理方式提供理论依据。【方法】通过盆栽试验，设置5个高温与涝交互胁迫处理（T1：高温，T2：高温与轻涝，T3：高温与重涝，T4：轻涝，T5：重涝）和1个对照（CK：常规灌溉），观测了孕穗期水稻剑叶叶绿素、可溶性糖、可溶性蛋白和抗氧化酶系统，研究了孕穗期高温与涝交互胁迫对水稻剑叶生理指标的影响。【结果】①孕穗期高温与涝交互胁迫处理降低水稻叶片叶绿素量，T2处理和T3处理分别较CK降低17.27%和19.54%，但恢复自然生长条件20 d后，T2处理表现出一定的超补偿效应，叶绿素量超过CK，且较CK增加12.22%；②孕穗期高温与涝交互胁迫后，水稻叶片中可溶性糖量先增加后降低，尤其是T2处理，胁迫结束时，较CK增加12.36%，恢复自然生长条件20 d后，较CK降低33.33%（P＜0.05）；③孕穗期高温与涝交互胁迫会提高水稻剑叶中SOD、POD、CAT活性，胁迫结束时，T2处理（高温与轻涝交互）的SOD、POD和CAT活性分别较CK提高102.08%、43.42%和39.80%（P＜0.05）。【结论】孕穗期高温与涝交互胁迫可以降低水稻叶片的叶绿素量，可以增强水稻叶片中抗氧化酶的活性；与单一的高温相比，高温与涝交互胁迫可以降低高温对水稻的伤害，但与单一的淹涝相比，高温与涝交互胁迫起到一定的加剧作用。 |
| 关键词: 胁迫；叶绿素；可溶性糖；抗氧化酶；水稻 |
| DOI：10.13522/j.ggps.cnki.20180323 |
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| The Effects of Alternate Hot Wave and Waterlogging on Physiological Traits of Rice at Booting Stage |
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ZHEN Bo, ZHOU Xinguo, LU Hongfei, LI Huizhen
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1.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; 2.National Research and Observation Station of Shangqiu Agro-ecology System, Shangqiu 476000, China
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| Abstract: |
| 【Objective】 Rice in southern Huanghuai Plain of China is susceptible to high temperature and waterlogging stress. This paper presents results of an experimental study on response of physiological traits of rice to alternate high temperature and waterlogging in attempts to improve rainwater use and reduce non-point source pollution.【Method】Rice was planted in pots and we investigated five treatments: high temperature (T1), high temperature coupled with light waterlogging (T2), high temperature coupled with heavy waterlogging (T3), light waterlogging (T4) and heavy waterlogging (T5). The control (CK) was conventional irrigation. For each treatment, we measured the chlorophyll, soluble sugars, soluble proteins and antioxidant enzyme in the flag leaves at booting stage, from which we analyzed the effects of alternate high-temperature and waterlogging on physiological indices of the flag leaf. 【Result】① Alternate occurrence of high temperature and waterlogging at the booting stage reduced the chlorophyll content in the flag leaf. Compared to CK, T2 and T3 reduced the chlorophyll content by 17.27% and 19.54% respectively. However, after recovering from the stresses, T2 saw a certain compensation and the chlorophyll content in its flag leaf increased consequently by 12.22% compared to the CK. ②The soluble sugar content in the flag leaf increased first followed by a decline after occurrence of high temperature and waterlogging at the booting stage, especially in T2 which was 12.36% higher than that in CK. After recovering for 20 days, the soluble sugar content in T2 was 33.33% lower than that in CK (P<0.05). ③High temperature and waterlogging at the booting stage enhanced the activities of SOD, POD and CAT in the flag leaf, and at the end of the stresses, the activities of SOD, POD and CAT in T2 increased by 102.08%, 43.42% and 39.80%, respectively, compared to those in the CK. 【Conclusion】Alternate high temperature and waterlogging at the booting stage reduced the chlorophyll content in the flag leaf but enhanced the activity of antioxidant enzymes. The effect of alternate high temperature and waterlogging is less detrimental than that caused by high temperature alone, but more damaging than that induced by waterlogging alone. |
| Key words: interaction; chlorophyll; soluble sugars; soluble proteins, antioxidant enzyme; rice |
