Effect of temperature and gibberellin on flowering regulation of Cymbidium goeringii

doi:10.3969/j.issn.1004-1524.2023.02.13

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (2): 355-363.DOI: 10.3969/j.issn.1004-1524.2023.02.13

• Horticultural Science • Previous Articles Next Articles

Effect of temperature and gibberellin on flowering regulation of Cymbidium goeringii

LIU Xiaofen¹(), LING Xiaoqi¹, XIANG Lili¹, YU Lu¹, SHEN Hong², LI Fang¹^,^*()

1. Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou 310058, China
2. Yilan Plantation, Yangcunqiao Town, Jiande 311603, Zhejiang, China

Received:2022-04-18 Online:2023-02-25 Published:2023-03-14
Contact: LI Fang

Abstract

Abstract:

In order to advance the flowering period of Cymbidium goeringii to the Spring Festival, C. goeringii was used as material, natural low-temperature and GA₃ treatments were carried out. The flowering rate, morphological indexes and physiological indexes of C. goeringii were analyzed. The results showed that the flowering period of C. goeringii could be advanced only after receiving appropriate low-temperature vernalization treatment. According to the results, the effective accumulative temperature hours below 5 ℃ were 105-350 h, too short or too long was not conducive to flowering. The best treatment combination to promote flowering and improve the ornamental value was to conduct natural temperature treatment for 30 days and then cultured in a greenhouse with an average temperature of 17-20 ℃ for 30 days, the flowering rate could reach to 78.57% on 15 days before Spring Festival and the flower stalk could reach to 12.64 cm during the Spring Festival. Effect of gibberellin on promoting flowering rate was not as good as low-temperature treatment. The best concentration of gibberellin was 60-90 mg·L^-1. Appropriate gibberellin treatment could enhance the low-temperature treatment and further improved the flowering rate. In addition, the analysis of physiological indexes indicated that the contents of soluble sugar and soluble protein in leaves were related to the flowering rate. Contents of soluble sugar and soluble protein were decreasing with the increase of flowering rate. This study screened an economical and convenient cultivation condition, which was of great economic significance to enrich the New Year’s eve flower market, and also played a good foundation for the regulation and standardization of the flowering period of spring orchid.

Key words: Cymbidium goeringii, flowering regulation, low temperature, gibberellin, flowering rate

CLC Number:

S682.31

LIU Xiaofen, LING Xiaoqi, XIANG Lili, YU Lu, SHEN Hong, LI Fang. Effect of temperature and gibberellin on flowering regulation of Cymbidium goeringii[J]. Acta Agriculturae Zhejiangensis, 2023, 35(2): 355-363.

Figures/Tables 5

Fig.1 Effects of different natural low temperature treatments on flowering rate and morphological indexes of Cymbidium goeringiiDifferent lowercase letters above bars represented statistically significant differences at the 0.05 probability level. The same as below.

Fig.2 Effects of different culture temperature conditions on flowering rate and morphological indexes of Cymbidium goeringii

Fig.3 Effects of different concentrations of gibberellin and spraying times on flowering rate and morphological indexes of Cymbidium goeringii

Fig.4 Effects of different concentrations of gibberellin on flowering rate and morphological indexes after low temperature treatment

Table 1 Physiological indexes of leaves after low temperature and gibberellin treatment

赤霉素质量浓度 Gibberellin concentration/ (mg·L^-1)	可溶性糖 Soluble sugar content/%	可溶性蛋白 Soluble protein content/%	SOD/ (U·g^-1·min^-1)	POD/×10³ (U·g^-1·min^-1)	CAT/×10³ (U·g^-1·min^-1)
0	1.70±0.10 a	11.26±0.77 a	34.18±1.23 b	70.86±1.63 b	11.17±1.34 b
60	1.07±0.03 c	8.90±1.12 c	35.46±0.25 b	81.20±11.84 ab	11.29±2.53 ab
90	1.49±0.07 b	9.72±0.31 bc	34.33±1.30 b	43.61±4.38 c	12.44±0.44 ab
120	1.57±0.10 ab	10.61±0.33 ab	34.04±0.74 b	82.89±2.03 a	13.32±1.01 ab
150	1.68±0.03 a	11.42±1.10 a	38.44±1.37 a	90.23±3.52 a	14.34±1.72 a

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Effect of temperature and gibberellin on flowering regulation of Cymbidium goeringii

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