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논문 기본 정보

자료유형
학술저널
저자정보
Tippawan Boonkaew (Kasetsart University) Chareerat Mongkolsiriwatana (Kasetsart University) Ananya Vongvanrungruang (Kasetsart University) Kornsorn Srikulnath (Kasetsart University) Surin Peyachoknagul (Naresuan University)
저널정보
한국유전학회 Genes & Genomics Genes & Genomics Vol.40 No.7
발행연도
2018.1
수록면
735 - 745 (11page)

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초록· 키워드

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Coconuts (Cocos nucifera L.) are divided by the height into tall and dwarf types. In many plants the short phenotype was emerged by mutation of the GA20ox gene encoding the enzyme involved in gibberellin (GA) biosynthesis. Two CnGA20ox genes, CnGA20ox1 and CnGA20ox2, were cloned from tall and dwarf types coconut. The sequences, gene structures and expressions were compared. The structure of each gene comprised three exons and two introns. The CnGA20ox1 and CnGA20ox2 genes consisted of the coding region of 1110 and 1131 bp, encoding proteins of 369 and 376 amino acids, respectively. Their amino acid sequences are highly homologous to GA20ox1 and GA20ox2 genes of Elaeis guineensis, but only 57% homologous to each other. However, the characteristic amino acids two histidines and one aspartic acid which are the two iron ( Fe2+) binding residues, and arginine and serine which are the substrate binding residues of the dioxygenase enzyme in the 20G-FeII_Oxy domain involved in GA biosynthesis, were found in the active site of both enzymes. The evolutionary relationship of their proteins revealed three clusters in vascular plants, with two subgroups in dicots and three subgroups in monocots. This result confirmed that CnGA20ox was present as multi-copy genes, and at least two groups CnGA20ox1 and CnGA20ox2 were found in coconut. The nucleotide sequences of CnGA20ox1 gene in both coconut types were identical but its expression was about three folds higher in the leaves of tall coconut than in those of dwarf type which was in good agreement with their height. In contrast, the nucleotide sequences of CnGA20ox2 gene in the two coconut types were different, but the expression of CnGA20ox2 gene could not be detected in either coconut type. The promoter region of CnGA20ox1 gene was cloned, and the core promoter sequences and various cis-elements were found. The CnGA20ox1 gene should be responsible for the height in coconut, which is different from other plants because no mutation was present in CnGA20ox1 gene of dwarf type coconut.

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참고문헌 (35)

참고문헌 신청
Agrawal GK / 1992 / Isolation of DNA from Choerospondias asillaris leave / Biotech Biodiv Lett 2:19~24 google schola Amborella Genome Project / 2013 / The Amborella genome and the evolution of flowering plants / Science 342(6165):1241089 Crossref Appleford NEJ / 2006 / Function and transcript analysis of gibberellin-biosynthetic enzymes in wheat / Planta 223:568~582 Crossref Ashikari M / 2002 / Loss-of-function of a rice gibberellin biosynthetic gene, GA20 oxidase (GA20ox-2), led to the rice 'green revolution' / Breed Sci 52:143~150 Crossref Carrera E / 1999 / Feedback control and diurnal regulation of gibberellin 20-oxidase transcript levels in potato / Plant Physiol 119:765~773 Crossref

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