Effects of Light Quality on the Photosynthetic Characteristics and Growth of Poinsettia

ACTA HORTICULTURAE SINICA ›› 2006, Vol. 33 ›› Issue (2): 338-343.

• 研究论文 • Previous Articles Next Articles

Effects of Light Quality on the Photosynthetic Characteristics and Growth of Poinsettia

Jiang Mingyan¹; Pan Yuanzhi^{1, 2}

(¹ College of Forestry and Horticultural, Sichuan Agricultural University, Ya'an 625014, China; ²The Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China)

Received:2005-03-18 Revised:2005-07-25 Online:2006-04-25 Published:2006-04-25

Abstract

Abstract: Using‘Red Velvet’and‘Prestige’as materials, the effects of different light quality ( red,yellow, blue) on poinsettia growth, flowerps ornamental value and flowering time were examined. The results indicated that red light promoted the contents of chlorophyll b and the growth of lateral shoots, and the flowering times were delayed 3 days, but it increased the flowerps ornamental values. Yellow light benefited the increase of the photosynthetic rate, promoted the growth of poinsettia in the early stage but inhibited in the later
stage. It decreased the flower's ornamental values of poinsettia although it had no effects on its flowering times.Blue light promoted the contents of chlorophyll a, inhibited the growth of lateral shoots and made flowers blooming 7 days earlier, but the flowerps ornamental values were normal.

Key words: Poinsettia ( Euphorbia pulcherrima Willd), Light quality, Photosynthetic characteristics, Ornamental value

Jiang Mingyan;Pan Yuanzhi;. Effects of Light Quality on the Photosynthetic Characteristics and Growth of Poinsettia[J]. ACTA HORTICULTURAE SINICA, 2006, 33(2): 338-343.

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Effects of Light Quality on the Photosynthetic Characteristics and Growth of Poinsettia

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