Effects of gibberellin and cytokinin on the tillers bud morphology of <i>Cynodon dactylon</i>

ZHANG Haiyan; SUN Xue; YU Hui; SUN Qiang; ZHOU Yue; ZHANG Yanhui

doi:10.11829/j.issn.1001-0629.2022-0702

Pratacultural Science > 2023 > 40(5): 1368-1377. > DOI: 10.11829/j.issn.1001-0629.2022-0702

ZHANG H Y, SUN X, YU H, SUN Q, ZHOU Y, ZHANG Y H. Effects of gibberellin and cytokinin on the tillers bud morphology of . Pratacultural Science, 2023, 40(5): 1368-1377 . DOI: 10.11829/j.issn.1001-0629.2022-0702

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Effects of gibberellin and cytokinin on the tillers bud morphology of Cynodon dactylon

ZHANG Haiyan^1,2,3,,
SUN Xue^1,2,3,
YU Hui^1,2,3,
SUN Qiang⁴,
ZHOU Yue⁵,
ZHANG Yanhui^1,2,3, ,

1.
College of Grassland Sciences, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
2.
Key Laboratory of West Arid Region Grassland Resources and Ecology, Urumqi 830052, Xinjiang, China
3.
Key Laboratory of Grassland Resources and Ecology of Xinjiang, Urumqi 830052, Xinjiang, China
4.
Xinjiang Uygur Autonomous Region Grassland Station, Urumqi 830049, Xinjiang, China
5.
Kashgar Prairie Station, Kashgar 844599, Xinjiang, China

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Corresponding author:
ZHANG Yanhui　E-mail: 717542457@qq.com
Received Date: August 31, 2022
Accepted Date: March 23, 2023
Available Online: April 18, 2023
Published Date: May 14, 2023

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Abstract

Abstract

Tillering is a biological characteristic of graminaceous plants, and the number of tillers is one of the key indicators of turfgrass density. Cynodon dactylon is a continuous tillering grass of the grass family. Tillering promotes the production of new branches and plays an important role in the rapid regeneration and formation of dense lawns. In this study, C. dactylon ‘Xinnong No. 1’ was sprayed with 1 μmol·L⁻¹ gibberellin (GA₃) and cytokinin (6-BA), respectively, to analyze the formation of tiller buds in tissue sections, anatomical structures, and phenotypes. The results showed that the tiller base was formed at the three-leaf stage and new tiller buds were formed at the eight-leaf stage before breaking through the mother stem. The tiller buds formed 5 d earlier at the seventh leaf stage in the GA₃ treatment and 8 d earlier at the sixth leaf stage in the 6-BA treatment. The number of tillers and root length increased with both hormone sprays; the number of tillers increased the most with the 6-BA treatment compared to that with the CK by 1.18 times. By observing the anatomical structure of the tiller buds at the leaf formation stage under different hormone treatments, it was observed that in epidermal thickness, cortical thickness, and vascular bundle diameter, 6-BA > GA₃ > CK; moreover, these characteristics were 1.28 times, 2.33 times, and 1.34 times more under the 6-BA treatment than in the GA₃ treatment. The results showed that the spraying of 6-BA at the early stage of dog root tillering was better than the spraying of GA₃ in promoting the growth and development of the tiller buds.
- Cynodon dactylon ‘Xinnong No.1’,
- gibberellin,
- cytokinin,
- tiller bud,
- top advantages,
- paraffin section,
- anatomical structure

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References (35)

References

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Effects of gibberellin and cytokinin on the tillers bud morphology of Cynodon dactylon

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