Functional Studies of JOINTLESS and Its Interacting MADS-domain Proteins in Tomato

ACTA HORTICULTURAE SINICA ›› 2011, Vol. 38 ›› Issue (4): 701-708.

• Vegetables • Previous Articles Next Articles

Functional Studies of JOINTLESS and Its Interacting MADS-domain Proteins in Tomato

WANG Xiang 1,2 and YIN Jun 1,*

¹ National Center for Wheat Research，Henan Agricultural University，Zhengzhou 450002，China；² Institute of Crop Sciences，Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement，Beijing 100081，China

Received:2011-01-18 Revised:2011-03-22 Online:2011-04-25 Published:2011-04-25
Contact: YIN Jun

Abstract

Abstract: The MADS-box gene JOINTLESS（J）is required for flower abscission zone formation in tomato. MADS-box genes encode a class of transcription factors that usually form protein complexes controlling the transcription of genes. This study aims to identify the specific function of J and its interacting MADS-box in tomato. Seven of the JOINTLESS-interacting MADS-domain proteins are selected，and the functions of their encoding genes are studied using RNA interference（RNAi）and transgenic overexpression strategies. It is found that knockdown of TAG1 expression not only causes severe morphological changes in male and female floral organs but also reduces fertility. Overexpression of J leads to higher than normal numbers of flowers in individual inflorescences and changes in fruit shape.

Key words: tomato, JOINTLESS, MADS-box gene, RNAi, overexpression

CLC Number:

S 641.2

WANG Xiang;and YIN Jun;. Functional Studies of JOINTLESS and Its Interacting MADS-domain Proteins in Tomato [J]. ACTA HORTICULTURAE SINICA, 2011, 38(4): 701-708.

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Functional Studies of JOINTLESS and Its Interacting MADS-domain Proteins in Tomato

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