Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (18): 27-32.doi: 10.11924/j.issn.1000-6850.casb19030017

Special Issue: 园艺

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Effects of Different Boron Deficiency Treatments on Leaf Growth and Photosynthetic Characteristics of Sugar Beet Seedlings

Hao Xueming, Wang Xiangling, Wu Zhenzhen, Song Baiquan(), Zhou Jianchao()   

  1. Heilongjiang University/Heilongjiang Provincial Key Lab of Cold Region Ecological Restoration and Resource Utilization/National Sugar Crops Improvement Center, Harbin 150080
  • Received:2019-03-04 Revised:2019-05-31 Online:2020-06-25 Published:2020-07-10
  • Contact: Song Baiquan,Zhou Jianchao E-mail:13212929229@163.com;zhou88767@126.com

Abstract:

The effects of different boron deficiency treatments on the growth and photosynthesis of sugar beet leaves were discussed, aiming to provide a theoretical basis for production practice. In the present research, a hydroponic experiment was conducted to measure the leaf morphological parameters and photosynthetic performance of sugar beet seedlings under different boron concentrations of 0 μmol/L (B1), 0.5 μmol/L (B2), 5 μmol/L (B3) and 50 μmol/L (B4, CK) after 21 days. The results showed that boron deficiency significantly inhibited the growth and development of sugar beet leaves, and the inhibition degrees were related with the intensity of the stress. The specific performance was: boron deficiency significantly reduced leaf area, fresh and dry weight, increased leaf thickness and leaf color value; decreased leaf chlorophyll a and chlorophyll b by 22.3%-51.5% and 23.3%-42.3%, respectively; the photosynthetic parameters decreased by 0.6%-28.4% compared with the control in the treatment of boron deficiency. Correlation analysis showed that the correlation between leaf area and photosynthetic pigment, photosynthetic rate, transpiration rate and intercellular CO2 concentration under boron deficiency reached very significant level (P<0.01). In conclusion, boron deficiency affects the leaf morphology of plants, inhibits the formation of photosynthetic pigments, significantly reduces the photosynthetic characteristics of leaves, and further reduces the biomass accumulation of sugar beet seedlings, leading to abnormal growth and development of leaves.

Key words: boron, sugar beet, growth parameters, photosynthetic characteristics

CLC Number: