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NO-mediated hypersensitive responses of rice suspension cultures induced by incompatible elicitor

机译：不相容激发子诱导水稻悬浮培养的NO介导的超敏反应

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摘要

Magnaporthe grisea special races 98-186-1G1 and 97-23-2D1 induce incompatible and compatible reactions respectively with rice "Xiushui". The elicitor from the cell wall of M. grisea race 98-186-1G1, termed IE, strongly induced the HR response in suspension cultures of rice "Xiushui", including increased PAL activity, transcription of pal, pr1, chi, cell death and the generation of NO. The elicitor prepared from the cell wall of M. grisea race 97-23-2D1, named CE, was much less efficient at inducing such effects. The NOS enzyme inhibitors L-NAA and PBITU suppressed the production of NO induced by IE in "Xiushui" rice. The increased PAL activity and transcription of pr1, pal, chi genes induced by IE were blocked by L-NAA, PBITU or CPTIO pretreatment. Direct treatment of rice cultures with the NO donor (SNP) also induced the transcription of pr1, pal and chi genes. These data implicated that NO acted as a signal mediating the HR induced by IE in rice and showed that NO, in combination with H_2O_2, is necessary for induction of cell death by IE in rice suspension cells.
机译：稻瘟病特殊种族98-186-1G1和97-23-2D1分别引起与水稻“秀水”的不相容和相容反应。稻瘟病菌98-186-1G1细胞壁的激发子，称为IE，在水稻“秀水”悬浮培养物中强烈诱导HR反应，包括增加的PAL活性，pal，pr1的转录，chi，细胞死亡和NO的产生从稻瘟病菌97-23-2D1的细胞壁制备的激发子，称为CE，在诱导这种效应方面效率低得多。 NOS酶抑制剂L-NAA和PBITU抑制了IE诱导的“秀水”水稻中NO的产生。 IE诱导的PAL活性增加和pr1，pal，chi基因的转录被L-NAA，PBITU或CPTIO预处理阻断。用NO供体（SNP）直接处理水稻培养物也诱导了pr1，pal和chi基因的转录。这些数据暗示NO充当介导IE在水稻中诱导的HR的信号，并且表明NO与H_2O_2结合对于水稻悬浮细胞中IE诱导的细胞死亡是必需的。

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