Crops ›› 2025, Vol. 41 ›› Issue (3): 218-224.doi: 10.16035/j.issn.1001-7283.2025.03.030

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Effects of Exogenous Hormones and Inhibitors on Hormone Content, Growth and Development of Peanut in Acidified Soil

Lü Rongzhen1(), Maihemuti∙Rouzi 2, Zhang Yong2, Maihemuti∙Remutula 2, Yaermaimaiti∙Alimu 2, Zhang Jiancheng3(), Yu Tianyi3()   

  1. 1Agricultural Technology Promotion Center of Laiyang, Yantai 265200, Shandong, China
    2Agricultural Technology Promotion Center of Kashgar, Kashgar 844000, Xinjiang, China
    3Shandong Peanut Research Institute, Qingdao 266100, Shandong, China
  • Received:2024-03-05 Revised:2024-08-14 Online:2025-06-15 Published:2025-06-03

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Abstract:

To clarify the regulatory mechanism of exogenous hormones on peanut growth and development under soil acidified stress, a pot experiment was conducted to investigate the effects of exogenous application of auxin (IAA), gibberellins (GA3), auxin inhibitor (TIBA) and gibberellin inhibitor (PAC) on the hormone content, morphological characteristics, nutrient absorption of peanut plants and yield in acidified soil. The results showed that, compared with the control, the application of IAA increased the IAA contents in leaves and pods during the critical growth period, improved pod nitrogen nutrition, increased harvest index, 100-pod weight and shelled kernel rate, which resulted in a higher yield. The application of GA3 led to the redundant growth of main stems and lateral branches, the reduction of phosphorus, potassium and calcium accumulation in pods and the decrease of effective pods per plant and harvest index and further reduced yield. The applications of TIBA and PAC were not conducive to the growth of peanut plants and roots, inhibited nutrient absorption, and significantly reduced yield. The negative effects of PAC were even greater, and peanuts could hardly grow normally. To sum up, application of exogenous IAA was an effective measure to alleviate the soil acidified stress for peanut, while GA3, TIBA and PAC were not conducive to the growth and development of peanuts on acidified soil.

Key words: Acidified soil, Exogenous hormone, Hormone inhibitor, Peanut, Morphological index, Endogenous hormone

Fig.1

Effects of exogenous hormones and hormone inhibitors on hormone content in peanut leaves and pods The different lowercase letters indicate significant differences among treatments at P < 0.05 level, the same below."

Fig.2

Effects of exogenous hormones and hormone inhibitors on plant morphology of peanut"

Table 1

Effects of exogenous hormones and hormone inhibitors on root morphology of peanut"

指标
Index		 根直径
Root diameter		 结荚期Pod-setting 成熟期Maturity
CK IAA TIBA GA3 PAC CK IAA TIBA GA3 PAC
根长
Root
length
(cm)
 0~0.5 mm 441.90a 440.12a 265.11b 451.84a 355.67ab 13 775.65a 13 511.13a 6242.60b 13 198.39a 4327.48b
0.5~1 mm 105.84a 118.90a 113.21a 106.72a 106.09a 2681.68a 2241.02a 1975.85a 2541.59a 1670.78a
>1 mm 6.37ab 7.22ab 7.90a 6.24b 7.41ab 696.16bc 554.12c 961.74a 846.64ab 914.42ab
总计 554.11a 566.24a 386.22b 564.79a 469.18ab 17 153.49a 16 306.28a 9180.20b 16 586.62a 6912.67b
根表面积
Root
surface
area
(cm2)		 0~0.5 mm 38.77ab 38.09ab 24.39c 39.96a 31.11bc 1181.79a 1051.56a 570.53b 1116.67a 375.68b
0.5~1 mm 23.26a 26.39a 25.22a 23.15a 23.45a 574.64a 483.96a 434.43a 562.74a 374.31a
>1 mm 3.05b 3.01b 3.76ab 3.55ab 4.02a 376.18b 335.78b 538.26a 454.03ab 443.75ab
总计 65.08a 67.49a 53.38b 66.66a 58.58ab 2132.60a 1871.29ab 1543.22bc 2133.43a 1193.73c
根体积
Root
volume
(cm3)
 0~0.5 mm 0.32a 0.31a 0.21b 0.33a 0.26b 9.48a 8.00a 4.88b 9.01a 3.16b
0.5~1 mm 0.42a 0.48a 0.46a 0.42a 0.43a 10.17a 9.42ab 7.89ab 9.73a 6.92b
>1 mm 0.16ab 0.2ab 0.21ab 0.16b 0.21a 26.96a 21.30a 32.37a 25.69a 25.64a
总计 0.90a 1.00a 0.89a 0.90a 0.90a 46.61a 38.73a 45.14a 44.43a 35.73a

Fig.3

Effects of exogenous hormones and hormone inhibitors on nutrient accumulation of peanut plants"

Table 2

Effects of exogenous hormones and hormone inhibitors on nutrient distribution of different organs %"

处理
Treatment		 N P K Ca
荚果
Pod		 其他器官
Other organs		 荚果
Pod		 其他器官
Other organs		 荚果
Pod		 其他器官
Other organs		 荚果
Pod		 其他器官
Other organs
CK 59.79ab 40.21bc 62.45a 37.55c 50.28a 49.72d 11.57ab 88.43bc
IAA 64.29ab 35.71bc 69.23a 30.77c 47.59ab 52.41cd 10.05b 89.95b
TIBA 67.49a 32.51c 62.09a 37.91c 44.58b 55.42c 14.02a 85.98c
GA3 55.55b 44.45b 51.17b 48.83b 37.62c 62.38b 9.46b 90.54b
PAC 19.94c 80.06a 19.68c 80.32a 13.19d 86.81a 4.03c 95.97a

Table 3

Effects of exogenous hormones and hormone inhibitors on yield and its component as well as dry matter weight of peanut"

处理
Treatment		 单株有效果数
Effective pods
per plant		 百果重
100-pod
weight (g)		 出米率
Shelled kernel
rate (%)		 其他器官干重（g/株）
Dry weight of other
organs (g/plant)		 产量（g/株）
Yield
(g/plant)		 生物产量（g/株）
Biomass yield
(g/plant)		 收获指数
Harvest
index (%)
CK 40.17a 47.71b 61.84bc 24.89b 19.17b 44.06a 43.50b
IAA 37.67a 55.79a 68.45a 19.95c 21.02a 40.97a 51.30a
TIBA 29.67b 56.86a 62.59bc 18.71c 16.87c 35.58b 47.42b
GA3 26.80b 57.99a 65.29ab 29.38a 15.54c 44.92a 34.60c
PAC 12.17c 26.33c 60.07c 15.93c 3.20d 19.13c 16.75d
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