Identification, transcriptional and functional analysis of heat ‐shock protein 90s in banana (Musa acuminata L.) highlight their novel role in melatonin‐mediated plant response to Fusarium wilt
In this study, nine 90 kDa heat‐shock proteins (HSP90s) were genomewide identified. Moreover, the expression profile of them in different organs, developmental stages, and in response to abiotic and fungal pathogen Foc were systematically analyzed. Notably, we found that the transcripts of 9 MaHSP90s were commonly regulated by melatonin (N‐acetyl‐5‐methoxytryptamine) and Foc infection. Further studies showed that exogenous application of melatonin improved banana resistance to Fusarium wilt, but the effect was lost when cotreated with HSP90 inhibitor (geldanamycin, GDA). Moreover, melatonin and GDA had opposite effect on auxin level in response to Foc4, while melatonin and GDA cotreated plants had no significant effect, suggesting the involvement of MaHSP90s in the cross talk of melatonin and auxin in response to fungal infection. Taken together, this study demonstrated that MaHSP90s are essential for melatonin‐mediated plant response to Fusarium wilt, which extends our understanding the putative roles of MaHSP90s as well as melatonin in the biological control of banana Fusarium wilt.
Source: Journal of Pineal Research - Category: Research Authors: Yunxie Wei, Wei Hu, Qiannan Wang, Hongqiu Zeng, Xiaolin Li, Yu Yan, Russel J. Reiter, Chaozu He, Haitao Shi Tags: Original Article Source Type: research
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