Scientia Agricultura Sinica ›› 2004, Vol. 37 ›› Issue (10): 1517-1520 .

• HORTICULTURE • Previous Articles     Next Articles

Phytochrome Control of Hypocotyl Length, Anthocyanin Biosynthesis and Inflorescence Initiation of Tomato Plants Grown Under White Light

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  1. 西北农林科技大学生命科学学院
  • Received:2003-10-09 Revised:2004-01-16 Online:2004-10-20 Published:2004-10-20

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Abstract: The wild type(WT) tomato and phytochrome mutants phyA, phyB1, phyB2, phyB1phyB2 and phyAphyB1phyB2 were used to study the effects of phytochrome on hypocotyl length, anthocyanin content and inflorescence initiation time. The results indicated that hypocotyl length and anthocyanin biosynthesis varied with phytochrome mutants. PHYB1 significantly inhibited hypocotyl elongation, but promoted anthocyanin biosynthesis. PHYA and PHYB2 showed relatively small influence on the two traits. However, PHYA and PHYB2 obviously interacted with PHYB1 to control hypocotyl elongation and anthocyanin biosynthesis. Double mutant phyB1phyB2 significantly promoted inflorescence initiation. The 1－4th inflorescences of triple mutant phyAphyB1phyB2 aborted at its early developmental stage, and resulted in extremely tiny ones.

Key words: Tomato, Phytochrome, Hypocotyl, Anthocyanin, Inflorescence initiation

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