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Correlation of the corn compensatory growth mechanism after post-drought rewatering with cytokinin induced by root nitrate absorption

Author

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  • Wang, Xiao-Ling
  • Wang, Jing-Jing
  • Sun, Run- Hong
  • Hou, Xiao-Gai
  • Zhao, Wei
  • Shi, Jiang
  • Zhang, You-Fu
  • Qi, Lin
  • Li, Xue-Lin
  • Dong, Pu-Hui
  • Zhang, Li- Xia
  • Xu, Guo-Wei
  • Gan, Hong-Bing

Abstract

The mechanism of compensatory growth in corn after post-drought rewatering at the seedling stage was explored by investigating the levels and effects of several plant hormones. This study consisted of two treatment conditions: nitrate (NO3−) addition to the roots and cytokinin addition to the leaves. Results showed that drought stress reduced the biomass of aboveground parts and the whole plant, but increased root soluble carbohydrate concentration and root activity. Post-drought rewatering under the addition of NO3− to the roots increased corn growth. Biomass values of the aboveground parts and the whole plant were similar between the rewatering and wetness at 10 days after rewatering conditions. Upon addition of NO3− to roots, post- drought rewatering increased the cytokinin contents of leaves and its delivery rate from roots to leaves. Addition of cytokinin to leaves without the addition of NO3− to roots increased the growth rate of corn seedlings upon post-drought rewatering and simultaneously caused high leaf cytokinin concentration. Thus, increase in concentration of root-derived cytokinin concentration in leaves was closely related to compensatory growth in corn upon post-drought rewatering at the seedling stage.

Suggested Citation

  • Wang, Xiao-Ling & Wang, Jing-Jing & Sun, Run- Hong & Hou, Xiao-Gai & Zhao, Wei & Shi, Jiang & Zhang, You-Fu & Qi, Lin & Li, Xue-Lin & Dong, Pu-Hui & Zhang, Li- Xia & Xu, Guo-Wei & Gan, Hong-Bing, 2016. "Correlation of the corn compensatory growth mechanism after post-drought rewatering with cytokinin induced by root nitrate absorption," Agricultural Water Management, Elsevier, vol. 166(C), pages 77-85.
  • Handle: RePEc:eee:agiwat:v:166:y:2016:i:c:p:77-85
    DOI: 10.1016/j.agwat.2015.12.007
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    References listed on IDEAS

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    1. Cui, Ningbo & Du, Taisheng & Li, Fusheng & Tong, Ling & Kang, Shaozhong & Wang, Mixia & Liu, Xiaozhi & Li, Zhijun, 2009. "Response of vegetative growth and fruit development to regulated deficit irrigation at different growth stages of pear-jujube tree," Agricultural Water Management, Elsevier, vol. 96(8), pages 1237-1246, August.
    2. Jin, Y.H. & Zhou, D.W. & Jiang, S.C., 2010. "Comparison of soil water content and corn yield in furrow and conventional ridge sown systems in a semiarid region of China," Agricultural Water Management, Elsevier, vol. 97(2), pages 326-332, February.
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    1. Wang, Xiao-Ling & Duan, Pei-Ling & Yang, Shen-Jiao & Liu, Yu-Hua & Qi, Lin & Shi, Jiang & Li, Xue-Lin & Song, Peng & Zhang, Li-Xia, 2020. "Corn compensatory growth upon post-drought rewatering based on the effects of rhizosphere soil nitrification on cytokinin," Agricultural Water Management, Elsevier, vol. 241(C).
    2. Wang, Xiao-Ling & Qin, Rong-Rong & Sun, Run-Hong & Wang, Jing-Jing & Hou, Xiao-Gai & Qi, Lin & Shi, Jiang & Li, Xue-Lin & Zhang, You-Fu & Dong, Pu-Hui & Zhang, Li-Xia & Qin, De-Hua, 2018. "No post-drought compensatory growth of corns with root cutting based on cytokinin induced by roots," Agricultural Water Management, Elsevier, vol. 205(C), pages 9-20.
    3. Wang, Xiao-Ling & Sun, Run-Hong & Wu, Di & Qi, Lin & Liu, Yu-Hua & Shi, Jiang & Li, Xue-Lin & Song, Peng & Zhang, Li-Xia, 2021. "Increasing corn compensatory growth upon post-drought rewatering using ammonia-oxidising bacterial strain inoculation," Agricultural Water Management, Elsevier, vol. 256(C).

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