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Physiological regulation of high transpiration efficiency in winter wheat under drought conditions

Author

Listed:
  • S. Changhai

    (Key Laboratory of Agricultural Water Resources & Hebei Key Laboratory of Agricultural Water-Saving, Centre for Agricultural Resources Research, Institute of Genetic and Developmental Biology, CAS, Shijiazhuang, P.R. China
    Graduate School, CAS, Beijing, P.R. China)

  • D. Baodi

    (Key Laboratory of Agricultural Water Resources & Hebei Key Laboratory of Agricultural Water-Saving, Centre for Agricultural Resources Research, Institute of Genetic and Developmental Biology, CAS, Shijiazhuang, P.R. China)

  • Q. Yunzhou

    (Key Laboratory of Agricultural Water Resources & Hebei Key Laboratory of Agricultural Water-Saving, Centre for Agricultural Resources Research, Institute of Genetic and Developmental Biology, CAS, Shijiazhuang, P.R. China)

  • L. Yuxin

    (Key Laboratory of Agricultural Water Resources & Hebei Key Laboratory of Agricultural Water-Saving, Centre for Agricultural Resources Research, Institute of Genetic and Developmental Biology, CAS, Shijiazhuang, P.R. China
    Graduate School, CAS, Beijing, P.R. China)

  • S. Lei

    (Shandong Agricultural University, Shandong, P.R. China)

  • L. Mengyu

    (Key Laboratory of Agricultural Water Resources & Hebei Key Laboratory of Agricultural Water-Saving, Centre for Agricultural Resources Research, Institute of Genetic and Developmental Biology, CAS, Shijiazhuang, P.R. China)

  • L. Haipei

    (Huazhong Agricultural University, Huazhong, P.R. China)

Abstract

Pot experiments were conducted to study the variation and physiological regulation of transpiration efficiency (TE) of four winter wheat (Triticum aestivum L.) varieties that are widely grown in different ecological regions in North China. Plants were grown under two soil moisture regimes, normal and drought stress. The results showed that under drought stress condition, both TE at plant level and TE at leaf level (TEl) increased significantly. The transpiration rate (Tr) was reduced more strongly than leaf net CO2 assimilation rate (Pn). The decline of Tr was mainly affected by stomatal conductance and the decline of Pn was affected by non-stomatal factors, which was confirmed by the decline in net photosynthetic oxygen evolution rate. The leaf soluble sugar content and proline content were significantly increased under drought stress. The stomatal density was increased and the stomatal length was reduced. These results led us to make the following conclusions: (1) Under drought stress, the increase in TEl appears to be regulated in two ways: via the stomata by regulating Tr, and independent of the stomata through regulation of Pn; regulation via the stomata was more sensitive; (2) Osmotic adjustment was closely correlated to the non-stomatal regulation, and stomatal aperture was closely correlated to the stomatal way.

Suggested Citation

  • S. Changhai & D. Baodi & Q. Yunzhou & L. Yuxin & S. Lei & L. Mengyu & L. Haipei, 2010. "Physiological regulation of high transpiration efficiency in winter wheat under drought conditions," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 56(7), pages 340-347.
    • Handle: RePEc:caa:jnlpse:v:56:y:2010:i:7:id:220-2009-pse
    DOI: 10.17221/220/2009-PSE
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    References listed on IDEAS

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    1. Richards, Richard A., 2006. "Physiological traits used in the breeding of new cultivars for water-scarce environments," Agricultural Water Management, Elsevier, vol. 80(1-3), pages 197-211, February.
    2. Kahlown, Muhammad Akram & Raoof, Abdur & Zubair, Muhammad & Kemper, W. Doral, 2007. "Water use efficiency and economic feasibility of growing rice and wheat with sprinkler irrigation in the Indus Basin of Pakistan," Agricultural Water Management, Elsevier, vol. 87(3), pages 292-298, February.
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    Cited by:

    1. Krishna Ghimire & Isabel McIntyre & Melanie Caffe, 2024. "Evaluation of Morpho-Physiological Traits of Oat ( Avena sativa L.) under Drought Stress," Agriculture, MDPI, vol. 14(1), pages 1-21, January.
    2. Yueping LIANG & Yang GAO & Guangshuai WANG & Zhuanyun SI & Xiaojun SHEN & Aiwang DUAN, 2018. "Luxury transpiration of winter wheat and its responses to deficit irrigation in North China Plain," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(8), pages 361-366.

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