›› 2019, Vol. 31 ›› Issue (7): 1119-1127.DOI: 10.3969/j.issn.1004-1524.2019.07.12

• Plant Protection • Previous Articles     Next Articles

Effects of different photoperiod conditions on the nutritional contents and related enzyme activities of sorghum leaves and Melanaphis sacchari

DU Junli1,2, WU Degong1,*, ZHAN Qiuwen1, HUANG Baohong1, NI He3   

  1. 1. College of Agriculture, Anhui Science and Technology University, Fengyang 233100, China;
    2. College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China;
    3. Extension Center of Agricultural Technology, Fengyang 233100, China
  • Received:2018-06-07 Online:2019-07-25 Published:2019-08-07

Abstract: To clarify effects of photoperiod condition on material contents of sorghum leaves and Melanaphis sacchari, five photoperiod conditions (light∶dark) were set in this paper, which were 2L∶22D, 6L∶18D, 10L∶14D, 14L∶10D and 18L∶6D, respectively. Soluble protein, soluble sugar, free amino acid, starch and chlorophyll content in sorghum leaves were determined. At the same time, activities of aspartate aminotransferase (AST), alanine transaminase (ALT), superoxide dismutase(SOD) and catalase (CAT), contents of soluble protein, soluble sugar, free amino acid and total fat in sorghum aphids were also determined. The results showed that contents of soluble sugar, free amino acid, starch and chlorophyll in sorghum leaves under long photoperiod (10L∶14D, 14L∶10D, 18L∶6D) were higher than those under short photoperiod (2L∶22D, 6L∶18D), protein content in sorghum leaf under short photoperiod (2L∶22D) and long photoperiod (14L∶10D) were lower than those under other photoperiod conditions; ALT and AST activities in sorghum aphid reached the highest values under photoperiod condition of 18h∶6D and reached the lowest values under photoperiod condition of 10L∶14D; SOD and CAT activities in sorghum aphids under short photoperiod (2L∶22D, 6L∶18D) were higher than those under long photoperiod (10L∶14D, 14L∶10D, 18L∶6D); Contents of protein, soluble sugar and total fat in sorghum aphid were the highest under photoperiod condition of 10L∶14D, and free amino acids content in sorghum aphid was the lowest when the photoperiod was 14L∶10D. Content of transaminase in sorghum aphids showed an increasing trend in response to the adverse environment at extreme photoperiod condition and the protective enzyme increased under short photoperiod; the photoperiod of 10L∶14D was suitable for growth and development of sorghum aphid, nutrient contents were higher in this condition. Contents of protein, soluble carbohydrate and total lipid of sorghum aphids showed decreasing trends in extreme photoperiod conditions.

Key words: photoperiod, sorghum, Melanaphis sacchari(Zehntner), soluble protein, superoxide dismutase, aspartate aminotransferase

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