[1]王碧茜,范晓荣,徐国华,等.不同氮效率水稻品种旗叶的衰老特征[J].南京农业大学学报,2010,33(2):8-12.[doi:10.7685/j.issn.1000-2030.2010.02.002]
 WANG Bi-qian,FAN Xiao-rong,XU Guo-hua,et al.Characteristics of flag leaf senescence among three rice cultivars with different nitrogen use efficiency[J].Journal of Nanjing Agricultural University,2010,33(2):8-12.[doi:10.7685/j.issn.1000-2030.2010.02.002]
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不同氮效率水稻品种旗叶的衰老特征()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
33卷
期数:
2010年2期
页码:
8-12
栏目:
出版日期:
2010-03-31

文章信息/Info

Title:
Characteristics of flag leaf senescence among three rice cultivars with different nitrogen use efficiency
作者:
王碧茜范晓荣徐国华沈其荣
南京农业大学资源与环境科学学院,江苏,南京,210095
Author(s):
WANG Bi-qian FAN Xiao-rong XU Guo-hua SHEN Qi-rong
College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
关键词:
水稻 旗叶 衰老 氮效率
Keywords:
rice flag leaf senescence nitrogen use efficiency
分类号:
S511
DOI:
10.7685/j.issn.1000-2030.2010.02.002
文献标志码:
A
摘要:
在土培条件下,选用氮高效水稻品种扬稻6号和氮低效水稻品种农垦57和日本晴,比较了它们的旗叶在开花期、灌浆期和成熟期的叶绿素含量、净光合速率(Pn)、可溶性蛋白含量、过氧化氢酶(CAT)活性、过氧化物酶(POD)活性和MDA含量变化,以及氮积累量、产量与氮效率的差异。结果表明:氮高效品种扬稻6号在生育后期旗叶叶绿素含量和Pn较高,灌浆期氮积累量比日本晴和农垦57高16%和25%,氮转移率比较恒定,CAT和POD活性较高,MDA含量较低,衰老较慢。氮低效品种日本晴和农垦57的旗叶氮转移率下降较快,灌浆期各为34%和35%,成熟期则下降到16%和19%;Pn和抗氧化酶活性下降较快,趋于早衰。可见扬稻6号旗叶延缓衰老对于促进水稻籽粒灌浆,维持氮高效十分重要。
Abstract:
Pot experiments were conducted to investigate the changes of chlorophyll content, net photosynthetic rate(Pn), N content, soluble protein(SB)content, catalase(CAT)activity, peroxidase(POD)activity and malondialdehyde(MDA)content among Yangdao 6, Nongken 57 and Nipponbare in flowering stage, grain filling stage and maturing stage. We found that the flag leaves of Yangdao 6 could stay green longer and maintain higher at Pn and soluble protein content. Furthermore, N content in Yangdao 6 flag leaves was 16% and 25% higher than Nipponbare and Nongken 57 in filling stage. Percentage of nitrogen translocation(PNT)remained relatively stable in Yangdao 6.Besides, CAT and POD activity in flag leaves of Yangdao 6 decreased more slowly, which resulted in a slower senescence compared with Nongken 57 and Nipponbare. By contrast, senescence happened earlier in the flag leaves of Nongken 57 and Nipponbare, which contented with lower Pn as well as more quickly decreasing in CAT and POD activity. PNT in Nongken 57 and Nipponbare dropped more quickly from 34% and 35% in grain filling stage to 16% and 19% in maturing stage, respectively. The results suggested that the delayed senescence in Yangdao 6 meaves could contribute more carbon and nitrogen sources to the seed filling and played a significant role at enhancing N use efficiency in rice plants.

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备注/Memo

备注/Memo:
国家自然科学基金项目(30671234,30500309)
更新日期/Last Update: 2010-03-31