Crops ›› 2019, Vol. 35 ›› Issue (4): 148-153.doi: 10.16035/j.issn.1001-7283.2019.04.022

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Effects of S3307 and DTA-6 on Sugar Metabolism and Yield of Potato Leaves and Tubers

Qi Deqiang1,Zhao Jingjing1,Feng Naijie1,2,Zheng Dianfeng1,2,Liang Xiaoyan1   

  1. 1 Chemical Control Research Room/Key Laboratory of Crop Germplasm Improvement and Cultivation in Cold Land, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang, China
    2 Guangdong Ocean University, Zhanjiang 524000, Guangdong, China
  • Received:2019-01-21 Revised:2019-06-08 Online:2019-08-15 Published:2019-08-06
  • Contact: Naijie Feng

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Abstract:

Under field cultivation conditions, potato Kexin 1 was sprayed with regulators S3307 and DTA-6 at seedling stage. The effects of different growth regulators on photosynthate change and yield between potato leaves and tubers were studied with water as a control. The results showed that the treatment of S3307 and DTA-6 could significantly increase the yield of potato and the content of sucrose and starch in early leaves. At the 34th day after spraying, S3307 and DTA-6 treatment promoted the transfer of starch from leaves to tubers, reduced starch content in leaves, and facilitated the export of substances from source organs; S3307 and DTA-6 significantly increased starch content in potato tubers at different sampling stages. S3307 and DTA-6 significantly increased the soluble sugar content in tubers on the 18th and 34th days after spraying. The changes of starch content in potato tubers were positively correlated with sucrose and starch content in leaves, and negatively correlated with invertase and amylase activity. The treatment of S3307 and DTA-6 significantly increased the weight per plant, and number of tuber per plant in DTA-6 treatment was significantly higher than that in control.

Key words: S3307, DTA-6, Potato, Growth and development, Yield

Table 1

Effects of S3307 and DTA-6 on potato yield and yield components"

处理Treatment 单株薯数Number of tuber per plant 单薯重Weight per plant (kg) 产量Yield (kg/hm2) 增产Increase (%)
CK 4.61±0.01Bb 0.09±0.04Cc 28 705.89±260.73Bb —
S3307 4.52±0.04Bb 0.12±0.06Aa 36 796.16±339.42Aa 28.18
DTA-6 4.83±0.06Aa 0.11±0.01Bb 37 618.78±279.90Aa 31.05

Table 2

Effects of S3307 and DTA-6 on starch content in leaves %"

处理Treatment 2d 10d 18d 26d 34d
CK 5.96±0.36Cc 5.13±0.23Bb 3.93±0.36Bb 5.13±0.37Aa 43.24±0.10Aa
DTA-6 13.37±0.30Aa 9.82±0.36Aa 8.69±0.43Aa 2.81±0.30Ab 38.90±0.75Bc
S3307 10.27±0.26Bb 3.98±0.39Bc 7.89±0.47Aa 4.07±1.08Aab 40.82±0.68ABb

Table 3

Effects of S3307 and DTA-6 on sucrose content in leaves %"

处理Treatment 2d 10d 18d 26d 34d
CK 12.28±0.73Bb 13.28±0.79Bb 20.52±0.61Bb 23.42±0.37Cc 20.52±0.66Bab
DTA-6 19.58±0.53Aa 16.74±0.76Aa 19.38±0.25Bb 27.73±0.57Aa 19.38±0.48Bb
S3307 19.90±0.34Aa 18.31±0.06Aa 22.64±0.10Aa 25.69±0.15Bb 22.68±0.59Aa

Table 4

Effects of S3307 and DTA-6 on amylase and invertase activities in leaves mg/(g·h)"

酶Enzyme 处理Treatment 2d 10d 18d 26d 34d
淀粉酶Amylase CK 9.23±0.30Cc 8.89±0.23Bb 14.85±0.85Aa 9.85±0.43Bc 6.43±0.48Bb
DTA-6 29.66±1.01Aa 15.46±0.65Aa 14.32±1.06ABa 13.94±0.77Ab 9.25±0.46Aa
S3307 18.85±0.83Bb 13.72±0.84Aa 10.86±0.33Bb 16.63±0.61Aa 3.65±0.10Cc
转化酶Invertase CK 6.42±0.21Aa 6.19±0.19Aa 6.88±0.28Aa 5.35±0.01Aab 4.49±0.10Aa
DTA-6 6.82±0.10Aa 5.18±0.13Bb 5.84±0.06Bb 5.72±0.20Aa 4.58±0.09Aa
S3307 6.41±0.15Aa 5.64±0.14ABb 5.29±0.02Bc 5.16±0.04Ab 4.90±0.25Aa

Fig.1

Effects of S3307 and DTA-6 on starch content in tubers Capital and lowercase letters show extremely significant difference (P<0.01) and significant difference (P<0.05) between different treatments, respectively. The same below"

Fig.2

Effects of S3307 and DTA-6 on soluble sugar content in tubers"

Fig.3

Effects of S3307 and DTA-6 on sucrose content in tubers"

Table 5

Correlations between sugar contents and invertase activities in potato leaves and tubers"

项目Item 叶片Leaf
淀粉含量
Starch content		 蔗糖含量
Sucrose content		 转化酶活性
Invertase activity		 淀粉酶活性
Amylase activity
块茎Tuber 淀粉含量Starch content -0.536** -0.663** -0.539** -0.368*
蔗糖含量Sucrose content -0.631** -0.670** -0.285* -0.434**
可溶性糖含量Soluble sugar content -0.652** -0.586** -0.420** -0.292*
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