›› 2019, Vol. 31 ›› Issue (7): 1079-1085.DOI: 10.3969/j.issn.1004-1524.2019.07.07

• Horticultural Science • Previous Articles     Next Articles

Effect of supplemental lighting with different light quality on fruit quality and related enzymes activities in pitaya

CHEN Xinyuan1, YIN Yiming2, ZHU Lixin3, TAO Ningying1, MAN Kun1, JIA Huijuan1,*   

  1. 1. Department of Horticulture, Zhejiang University, Hangzhou 310000, China;
    2. Huzhou Economic Crop Technology Extension Station, Huzhou 313000, China;
    3. Changxing Anxin Family Farm, Huzhou 313100, China
  • Received:2019-01-14 Online:2019-07-25 Published:2019-08-07

Abstract: In this study, a red pitaya cultivar, Zimilong was used as the experimeatal matertal. Two levels of blue to red light ratios (1∶4 and 1∶2) in light emitting diode (LED) were set up as the treatments, and no artificial light group was the control. By measuring the content of sucrose, glucose, fructose as well as activities of sucrose metabolism-related enzymes in the flesh of pitaya at three important stages, we attempted to preliminarily explore the mechanism of light supplementation regulating sugar accumulation. Results showed that the total soluble solid (TSS) and sucrose content in fruits under LED light supplementation with blue and red light ratio of 1∶2 were higher than other treatments, the activity of sucrose phosphate synthase (SPS) and sucrose synthase (SS) showed the same as well, while the activity of acid invertase (AI) was opposite. There was no significant difference except for fructose content and AI activity in mature fruit in the treatment of 1∶4 was lower than the control. Overall, the sucrose content of the first batch of spring pitaya was improved in the LED light supplementation with blue and red light ratio of 1∶2. Maybe, less red light ratio could promote sucrose, reduced glucose and fructose by inhibiting the activity of AI and promoting the activity of SPS and SS so as to promote sucrose and TSS in fruit.

Key words: pitaya, light emitting diode, fruit quality, sugar, metabolic enzyme

CLC Number: