细胞分裂素对吊兰根生长和负向光性的影响

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Abstract

To explore the effects of cytokinin on the growth and negative phototropism of Chlorophytum comosum var.variegata root, some healthy plants of Chlorophytum comosum var.variegata were selected and cultivated in different concentration of 6-BA solution with unilateral light illuminated,and the growth rate and the negative inclination of the root of chlorophytum comosum were measured. The results showed that:(1) 6-BA inhibited the growth of both the adventitious root and the branch root growing out from the adventitious root,decreased the bend angle of the negative phototropism of all of the elongated root,the inhibited degree was intensified with the increase of 6-BA concentration.(2)The adventitious root ceased to elongation when treated for 7 days with 10mg·L^-1 6-BA or for 5 days with 100mg·L^-1 6-BA;(3) All the branch root growing out from the adventitious root could not extend but form much little bump from the surface of the adventitious root when treated with 10-100 mg·L^-1 6-BA,the amount of the bump from the surface of the adventitious root were increased with the rise the concentration of 6-BA;(4) The negative phototropism of control was remarkable and inclination angle was near 90°,but inclination angle decreased to about 15°when treated with100mg·L^-1 6-BA.The possible mechanism was discussed in this study.

Key words： Chlomphytum comosum var.variegata root negative phototropism 6-BA

Received: 25 February 2011

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	CHEN Yan
	HUANG Na
	CHEN Juan

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CHEN Yan,HUANG Na,CHEN Juan. Effects of cytokinin on the growth and negative phototropism of Chlorophytum comosum var.variegata root[J]. , 2011, 30(1): 51-54.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2011/V30/I1/51

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