Crops ›› 2020, Vol. 36 ›› Issue (6): 197-201.doi: 10.16035/j.issn.1001-7283.2020.06.029

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The Stimulatory Effect of Different Sunflower Varieties Root Exudates on Germination of Sunflower Broomrape

Di Na1(), Zheng Na2, Han Haijun3(), Wang Jing1, Cui Chao1, Zheng Xiqing1   

  1. 1Agriculture Department, Hetao College, Bayan Nur 015000, Inner Mongolia, China
    2College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018, Inner Mongolia, China
    3Agrotechnical Promotion Center of Bayan Nur, Bayan Nur 015000, Inner Mongolia, China
  • Received:2020-07-14 Revised:2020-10-14 Online:2020-12-15 Published:2020-12-09
  • Contact: Han Haijun E-mail:370526637@qq.com;395340878@qq.com

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Abstract:

In order to explain the reason for the differentiation in sunflower resistance to broomrape , the root exudates of different resistant sunflower varieties were used as germination stimuluses to study the effect on germination of sunflower broomrape seeds. The results showed: The dilution of multiple sunflower root exudates had a significant impact on germination of sunflower broomrape seeds. When the germination rate of sunflower broomrape seeds reached maximum, the root exudates of TP-3313 and SH363-M were diluted 50 times, the root exudates of 3638C was diluted 75 times. It trended that low concentration promoted germination, and high concentration inhibited germination. The effects of root exudates of different resistant sunflower varieties on the germination of sunflower broomrape seeds were different. The order of germination rate of sunflower broomrape seeds showed that TP-3313 < SH363-M < 3638C. The combined action effects of the different resistant sunflower root exudates and dehydrocostus lactone on germination of sunflower broomrape seeds showed: TP-3313 and SH363-M root exudates decreased the promoting effect of dehydrocostus lactone, while 3638C root exudates enhanced the promoting effect of dehydrocostus lactone.

Key words: Sunflower, Root exudates, Sunflower broomrape, Germination, Resistance

Table 1

Effects of dilution multiples of sunflower root exudates on germination rate of sunflower broomrape seeds %"

处理Treatment TP-3313 SH363-M 3638C
T0 18.47±0.38Dd 22.23±0.76Dd 28.63±0.60Dd
T20 20.63±0.61Cc 24.98±0.67Cc 30.74±0.75Cc
T50 23.00±0.18Bb 27.99±0.69Bb 31.47±0.19Cc
T75 17.22±0.17Ee 19.53±0.35Ee 34.59±0.59Bb
T100 11.26±0.05Ff 14.55±0.77Ff 20.79±0.19Ee
T150 6.85±0.36Gg 5.82±0.35Gg 12.47±0.21Ff
T200 4.54±0.81Hh 4.32±0.37Hh 7.70±0.30Gg
CK1 4.86±0.29Hh 4.87±0.20GHh 5.04±0.21Hh
CK2 64.43±0.26Aa 64.96±0.32Aa 62.28±0.81Aa

Fig.1

Effects of different resistant sunflower root exudates on the germination of sunflower broomrape seeds Different capital letters and lowercase letters indicate significant differences at 0.01 and 0.05 levels between different dilution multiples treatments, respectively. The same below"

Fig.2

The combined effects of the different resistant sunflower root exudates and dehydroxylolactone on germination rate of sunflower broomrape seeds KL, NL, and GL represent the root exudates of TP-3313, SH363-M, and 3638C, respectively, KLT, NLT and GLT represent the combined action effects of TP-3313, SH363-M and 3638C root exudates and dehydroxylolactone, respectively"

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