Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (1): 56-61.doi: 10.11924/j.issn.1000-6850.casb20190700365

Special Issue: 生物技术 园艺 农业生态

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Effects of Light Quality on the Growth and Physiological Resistance of Tomato Seedlings Under Low-Phosphate Stress

Liang Ying, Shi Yu, Jin Xiu, Zhang Siyu, Hou Leiping, Zhang Yi()   

  1. College of Horticulture/Collaborative Innovation Center of Quality and Profit Improvement for the Protected Vegetables of Shanxi Province, Shanxi Agricultural University, Taigu Shanxi 030801
  • Received:2019-07-01 Revised:2019-08-28 Online:2020-01-05 Published:2020-01-07
  • Contact: Zhang Yi E-mail:harmony1228@163.com

Abstract:

To explore the effects of different light quality on the growth and physiological characteristics of tomato seedlings under low phosphorus stress, we used ‘Zhongza 9’ tomato cultivar as the experimental material and set up six combination treatments with two light quality (white and blue-violet light) and three P levels (0.66, 0.44 and 0.22 mmol/L NaH2PO4) under hydroponic cultivation. The results showed that, compared with the control treatment, the leaf chlorophyll contents, leaf relative water content and biomass were significantly reduced under low phosphorus condition, while the total root length, the MDA level, SOD, peroxisome, CAT activity, and the content of soluble sugar, soluble protein and proline increased significantly. At the same time, compared with white light treatment, blue violet treatment could obviously increase the chlorophyll content, leaf relative water content, total root length, total surface area, average diameter of tomato seedlings, thus to improve the accumulation of biomass. In summary, blue-violet treatment can enhance the adaptability of tomato plants to low phosphorus stress.

Key words: low-phosphate stress, light quality, tomato, physiological resistance

CLC Number: