外施赤霉素对重瓣大花萱草开花、内源激素和酶活性的影响

doi:10.12190/j.issn.2096-1197.2020.02.15

Abstract

Abstract: 【Objective】To investigate the effect of GA₃ on flowering and physiological characteristics of Hemerocallis fulva (L.) var. kwanso Regel.【Methods】Hemerocallis fulva (L.) var. kwanso Regel lace squares were selected as experimental materials. Four concentrations of gibberellin (GA₃) foliar spraying to observe the effects of flowering of lace squares,endogenous hormones and enzyme activities.【Results】When Hemerocallis fulva (L.) var. kwanso Regel lace squares began to produce scape,sprayed different concentration of gibberellin (GA₃) could early its flowering time and flowering number,especially spraying 1 000 mg/kg of gibberellic acid (GA₃), initial flowering 11 d early and 127.5% more flower number compared with control ; Spraying different concentrations of gibberellin (GA₃) could increase the content of IAA and gibberellin (GA₃),and decreased abscisic acid (ABA),promoted the activities of superoxide dismutase (SOD) and peroxidase (POD) in flower buds, and inhibited the activities of catalase (CAT).【Conclusion】Applying gibberellin (GA₃) on the leaf surface could promote the flowering of the lace kerchief,prolong the flowering period, increase the content of IAA and GA₃, stimulate the activity of SOD and POD, and realize the regulation of flowering period in Hemerocallis fulva (L.) var. kwanso Regel.

Key words: Hemerocallis fulva (L.) var. kwanso Regel, Gibberellin(GA₃), Auxin, Abscisic acid, Enzyme activity

CLC Number:

S682.19

CHEN Fen, LUO Guijie, TAN Jun. Effects of spraying gibberellin on flowering, endogenous hormones and enzyme activities in Hemerocallis fulva (L.) var. kwanso Regel “Double Firecracker”[J].Journal of Northern Agriculture, 2020, 48(2): 96-101.

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Effects of spraying gibberellin on flowering, endogenous hormones and enzyme activities in Hemerocallis fulva (L.) var. kwanso Regel “Double Firecracker”

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