摘要
以国稻6号(杂交籼稻)和秀水09(粳稻)为材料,在水培条件下研究通气增氧对水稻苗期根系生长和氮代谢的影响。结果表明,增氧处理水稻根系干物质积累量、根长、根体积、根系活力以及吸收面积较对照均有不同程度增加。水稻根系硝态氮(NO3-N)含量、游离氨基酸和可溶性糖含量均增加。谷氨酸合成酶(GS)、谷草转氨酶(GOT)和谷丙转氨酶(GPT)活性均增强。在本试验条件下,增氧能显著提高粳稻秀水09苗期根系氮代谢相关酶生理活性;但增氧对杂交籼稻国稻6号根系氮代谢相关酶生理活性影响不显著,说明通气增氧对水稻根系氮代谢生理活性的影响可能与水稻基因型有关。
In order to clarify the effects of aeration on root nitrogen metabolism in rice seedling, root growth, the activitiesof glutamine synthetase （GS）, glutamic acid-pyruvic acid transaminase （GPT）, glutamic acid oxaloacetate transaminase （GOT）, the contents of nitrate （NO3-N）, free amino acids and sugar content in root were investigated under continous aeration treatment in hydroponics with indica hybrid rice combination Guodao 6 and japonica Xiushui 09 as material. The results showed that rice seedlings grown in oxygenation solutions had higher root dry matter, longer root length, stronger root activity and larger root absorption area, compared with the control. In addition, the contents of nitrate, soluble sugar, root vigor, the activities of GS, GOT and GPT of aeration-treated rice plants were higher than those of the control. The activities of enzymes involved in root nitrogen metabolism of Xiushui 09 were enhanced by oxygenation. However, oxygenation had no significant influence on root nitrogen metabolism of Guodao 6, which suggested that oxygenation effect on rice root nitrogen metabolism might be genotype-specific.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2012年第3期320-324,共5页
Chinese Journal of Rice Science
基金
浙江省自然科学基金资助项目(Y3100270)
国家科技支撑计划资助项目(2011BAD16B14)
关键词
水稻
增氧
根系
氮代谢
rice
aeration
root physiology
nitrogen metabolism
