氮胁迫对红麻生理生化特性及干茎产量的影响

【目的】探讨红麻亲本及其子代耐低氮能力的差异,为耐低氮红麻品种的筛选及其遗传改良提供理论依据。【方法】以红麻不育系P3A、恢复系992及子代F1为材料,设置不施氮（N0）和正常施氮（N＋）两个处理,通过盆栽试验,研究氮胁迫对红麻苗期主要生理生化特性及其产量的影响。【结果】正常施氮（N＋）条件下,亲本的茎、叶水分含量、叶绿素含量和氮、磷、钾含量均高于F1,但硝酸还原酶活性及单株干茎产量均低于F1;在不施氮（N0）条件下,F1的茎叶水分含量、叶绿素含量、硝酸还原酶活性、氮含量降幅均比亲本小,而磷、钾含量增幅比亲本高;氮胁迫下,参试红麻植株茎叶水分和氮含量、硝酸还原酶活性、叶绿素含量均下降,而植株茎...

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Bibliographic Details
Published in南方农业学报 Vol. 42; no. 6; pp. 609 - 611
Main Author 赵丹 莫良玉 刘铭 周瑞阳
Format Journal Article
LanguageChinese
Published 广西大学农学院,南宁,530005 2011
Subjects
干茎产量
氮胁迫
生理生化特性
红麻
干茎产量
生理生化特性
红麻
氮胁迫
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ISSN2095-1191
DOI10.3969/j.issn.2095-1191.2011.06.010

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Summary:【目的】探讨红麻亲本及其子代耐低氮能力的差异,为耐低氮红麻品种的筛选及其遗传改良提供理论依据。【方法】以红麻不育系P3A、恢复系992及子代F1为材料,设置不施氮（N0）和正常施氮（N＋）两个处理,通过盆栽试验,研究氮胁迫对红麻苗期主要生理生化特性及其产量的影响。【结果】正常施氮（N＋）条件下,亲本的茎、叶水分含量、叶绿素含量和氮、磷、钾含量均高于F1,但硝酸还原酶活性及单株干茎产量均低于F1;在不施氮（N0）条件下,F1的茎叶水分含量、叶绿素含量、硝酸还原酶活性、氮含量降幅均比亲本小,而磷、钾含量增幅比亲本高;氮胁迫下,参试红麻植株茎叶水分和氮含量、硝酸还原酶活性、叶绿素含量均下降,而植株茎叶磷、钾含量均有所提高。【结论】在正常施氮（N＋）条件下,F1生长势更强,单株干茎产量更高;在不施氮（N0）条件下,F1表现出较强的耐低氮生理特性,抗逆境优势强于亲本,因此F1适宜推广选种。
Bibliography:45-1381/S
Hibiscus cannabinus L.; nitrogen stress; physio-biochemical characteristic; dry stem yield
ZHAO Dan, MO Liang-yu, LIU Ming, ZHOU Rui-yang （Agricultural College, Guangxi University, Nanning 530005, China）
[Objective]The present study was conducted to provide a theoretical basis for authenticating the tolerance of parents and filial generations of Hibiscus cannabinus L. to low N-fertilization during the seedling stage. [Method]The male sterility line P3A, restorer line 992 and their first filial generation F1 were treated with N （N＋） and without N （N0） fertilizer in a pot culture experiment to investigate their main physio-biochemical characteristics and dry stem yield at seedling stage. [Result]The plants treated with N＋ showed higher water, chlorophyll and the N, P, K content in leaf and stem of parents than in that of F1, however, the nitrate reductase activity and dry stem yield of parents were lower than those of F1 plants. In N0 treatment, the reduction in water and chlorophyll content, nitrate red
ISSN:2095-1191
DOI:10.3969/j.issn.2095-1191.2011.06.010