영하의 저온에 노출된 ‘Campbell Early’와 ‘Muscat Bailey A’ 포도나무 신초의전사체 비교
Transcriptomic analysis of ‘Campbell Early’ and ‘Muscat Bailey A’ grapevine shoots exposed to freezing cold stress
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초록
환경스트레스 중의 하나인 저온에 대한 생육기의 포도나무의 반응을 분석하고자 -2°C에서 4일 동안 저온처리 한두 품종(‘Campbell Early’와 ‘Muscat Baily A’)의 포도나무잎을 이용하여 전사체를 분석하였고 특이발현유전자(differentially expressed genes, DEGs)를 검색하였다. 영하의 저온에 반응한 ‘Campbell Early’의 DEG를 기능별로 분석한결과 생물대사에서 17,424개, 세포구성에서 28,954개, 분자기능에서는 6,972개의 유전자와 관련이 있었다. 발현이 유도되는 유전자로는 dehydrin xero 1, K-box region and MADS-box transcription factor family protein과 MYB domain protein 36이 있으며, 억제되는 유전자로는 light-harvesting chlorophyll B-binding protein 3, FASCICLIN-like arabinoogalactan 9와 pectin methylesterase 61 등이 있었다. ‘Muscat Baily A’ 의 DEG는 생물대사에서 1,157개, 세포구성에서 1,350개, 분자기능에서는 431개의 유전자와 관련이 있었다. 발현이 유도되는 유전자로는 NB-ARC domain-containing disease resistance protein, fatty acid hydrozylase syperfamily와 isopentenyltransferase 3이 있으며, 억제되는 유전자로는 binding, IAP-like protein 1과 pentatricopeptide repeat superfamily protein 등이 있었다. Real-time PCR을 이용하여 영하의 저온에서특이적으로 발현하는 유전자들을 검정하였으며, InterPro Scan을 통해 단백질 도메인을 분석한 결과 두 품종 모두에서 ubiquitin-protein ligase가 가장 많았다. 영하의 저온에노출된 신초의 전사체 정보를 바탕으로 포도나무에서 저온 내성을 발현하는 기작을 연하는 데에 분자수준의 정보를 제공하고, 내한성 포도를 육종하는데 이용될 수 있을 것이다.
Abstract
To understand the responses of grapevines in response to cold stress causing the limited growth and development, differentially expressed genes (DEGs) were screened through transcriptome analysis of shoots from 2 grapevine cultivars (‘Campbell Early’ and ‘Muscat Baily A’) kept at -2°C for 4 days. In gene ontology analysis of DEGs from ‘Campbell Early’, there were 17,424 clones related with biological process, 28,954 with cellular component, and 6,972 with molecular function genes in response to freezing temperature. The major induced genes included dehydrin xero 1, K-box region and MADS-box transcription factor family protein, and MYB domain protein 36, and inhibited genes included light-harvesting chlorophyll B-binding protein 3, FASCICLIN-like arabinoogalactan 9, and pectin methylesterase 61 in ‘Campbell Early’ grapevines. In gene ontology analysis of DEGs from ‘Muscat Baily A’, there were 1,157 clones related with biological process, 1,350 with cellular component, and 431 with molecular function gene. The major induced genes of ‘Muscat Baily A’ included NB-ARC domain-containing disease resistance protein, fatty acid hydrozylase superfamily, and isopentenyltransferase 3, and inhibited genes included binding, IAP-like protein 1, and pentatricopeptide repeat superfamily protein. All major DEGs were shown to be expressed differentially by freezing temperature in real time-PCR analysis. Protein domain analysis using InterPro Scan revealed that ubiquitin-protein ligase was redundant in both tested grapevines. Transcriptome profile of shoots exposed to cold can provide new insights into the molecular basis of tolerance to low-temperature in grapevines, and can be used as resources for development new grapevines tolerant to coldness.
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