identification and characterization of flowering genes in kiwifruit sequence conservation and role in kiwifruit flower development开花基因的识别和表征猕猴桃猕猴桃花发展序列保护和作用.pdfVIP

identification and characterization of flowering genes in kiwifruit sequence conservation and role in kiwifruit flower development开花基因的识别和表征猕猴桃猕猴桃花发展序列保护和作用

Identification and characterization of flowering genes in kiwifruit: sequence conservation and role in kiwifruit flower development Varkonyi-Gasic et al. Varkonyi-Gasic et al. BMC Plant Biology 2011, 11:72 /1471-2229/11/72 (27 April 2011) Varkonyi-Gasic et al. BMC Plant Biology 2011, 11:72 /1471-2229/11/72 RESEARCH ARTICLE Open Access Identification and characterization of flowering genes in kiwifruit: sequence conservation and role in kiwifruit flower development * Erika Varkonyi-Gasic , Sarah M Moss, Charlotte Voogd, Rongmei Wu, Robyn H Lough, Yen-Yi Wang and Roger P Hellens Abstract Background: Flower development in kiwifruit (Actinidia spp.) is initiated in the first growing season, when undifferentiated primordia are established in latent shoot buds. These primordia can differentiate into flowers in the second growing season, after the winter dormancy period and upon accumulation of adequate winter chilling. Kiwifruit is an important horticultural crop, yet little is known about the molecular regulation of flower development. Results: To study kiwifruit flower development, nine MADS-box genes were identified and functionally characterized. Protein sequence alignment, phenotypes obtained upon overexpression in Arabidopsis and expression patterns suggest that the identified genes are required for floral meristem and floral organ specification. Their role during budbreak and flower development was studied. A spontaneous kiwifruit mutant was utilized to correlate the extended expression domains of these flowering genes with abnormal floral development. Conclusions: This study provides a description of flower development in kiwifruit at the molecular level. It has i

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