The Effects of Two Growth Regulators on Diurnal Assimilate Physiological Metabolism Variation of Soybean Leaves and Yield(PDF)

¡¶´ó¶¹¿Æѧ¡·[ISSN:1000-9841/CN:23-1227/S]

Issue:

2019Äê02ÆÚ

Page:

244-250

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Title:

The Effects of Two Growth Regulators on Diurnal Assimilate Physiological Metabolism Variation of Soybean Leaves and Yield

Author(s):

LIANG Xiao-yan¹; LIU Chun-juan¹; FENG Nai-jie¹; 2; ZHENG Dian-feng¹; 2; LU Jie-chun¹; XIANG Hong-tao³

(1.College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China; 2.Agricultural College, Guangdong Ocean University, Zhenjiang 524000, China; 3.Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China)

Keywords:

Plant growth regulators£¨PGRs£©;  Soybean;  Diurnal variation;  Carbohydrate metabolism;  Yield

PACS:

-

DOI:

10.11861/j.issn.1000-9841.2019.02.0244

Abstract:

In order to investigate the effects of two different plant growth regulators on diurnal variation in physiological metabolism of assimilate in soybean leaves and yield, two soybean varieties, Hefeng 50 and Kenfeng 16, were used as experimental materials. The leaves were sprayed with uniconazole(S₃₃₀₇) and 2-N,N-diethylamino ethylcaproate(DTA-6) in the field at early flowering stage, and the control was sprayed with water. Four time points, 9¡Ã30, 17¡Ã30, 21¡Ã30 and 5¡Ã30(the next day), were selected in one day at seed filling stage. The functional leaves of soybean were taken at each treatment, and the contents of sucrose, starch and the activities of key enzymes in sucrose metabolism were determined. Then the yield was determined at maturation stage. The results showed that, both S₃₃₀₇ and DTA-6 could promote the accumulation of sucrose and starch in the leaves of the two cultivars during the day and the degradation at night. Moreover, the effect of S₃₃₀₇ on the regulation of leaf sucrose were better than that of DTA-6, and the effect of DTA-6 on the regulation of leaf starch of the two cultivars were better than that of Sª­3307. At different time points, S₃₃₀₇ and DTA-6 treatments increased the sucrose and starch transport rate in leaves of Hefeng 50 and Kenfeng 16 at night, S₃₃₀₇ and DTA-6 treatments increased the activities of sucrose synthase and sucrose phosphate synthase in leaves of two cultivars and reached the maximum at 17¡Ã30, which was propitious to the synthesis of sucrose during the day. S₃₃₀₇ and DTA-6 increased the activity of sucrose invertase during the day and night, S₃₃₀₇ and DTA-6 could effectively regulate the number of pods per plant and seed per plant, and finally increase the yield. The yield of Hefeng 50 treated with S₃₃₀₇ and DTA-6 increased 17.76% and 37.67% respectively compared with the control, and the yield of Kenfeng16 increased 11.34% and 32.49% respectively compared with the control. It concluded that both S₃₃₀₇ and DTA-6 could increase the yield of Hefeng 50 and Kenfeng 16 soybean varieties by promoting leaf diurnal assimilate metabolism.

References:

£Û1£ÝÖ£µî·å, ÕÅÏþÑÞ, ÀӢ, µÈ. ´ó¶¹ÈºÌå¹âºÏÌØÐÔµÄÑо¿ÏÖ×´£ÛJ£Ý. ´ó¶¹¿Æѧ, 2007, 26(3):412-416. (Zheng D F, Zhang X Y, Li J Y, et al. The recent researth concering photosynthetic characters in soybean population£ÛJ£Ý. Soybean Science, 2007, 26(3): 412-416.)

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