Deficiency of water can enhance root respiration rate of drought-sensitive but not drought-tolerant spring wheat

By Hongsheng Liu, Fengmin Li, Hao-jie Xu. 2004

93 citations recorded by the source corpus.

Root respiration was measured in vivo by infrared gas analysis of complete root systems in drought-sensitive (Longchun 8139-2) and drought-tolerant (Dingxi 24) spring wheat (Triticum aestivum) cultivars. Plants were grown in sand culture for 3 weeks under the following regimes: (a) water sufficiency, (b) moderate drought stress or (c) severe drought stress. The aim was to study the acclimation to drought stress in terms of changes in root growth, root respiration and energy requirement for water uptake. Drought stress increased the root:shoot ratio of both varieties. Roots of water-sufficient treatments respired 4.03 and 2.87 mg glucose h-1 g-1 in Longchun 8139-2 and Dingxi 24, respectively. However, severe drought stress enhanced root respiration of Longchun 8139-2 and Dingxi 24 to 6.52 and 3.01 mg glucose h-1 g-1, respectively. Compared with water-sufficient plants, drought-sensitive spring wheat (Longchun 8139-2) used a relatively higher amount of glucose to absorb water in drought stress treatment, especially in severe drought stress. The drought-resistant spring wheat Dingxi 24 used lower amount of glucose to absorb water in drought stress conditions, relative to drought-sensitive plants. In the arid and semi-arid region of the Losses Plateau, drought-resistant wheat species have many advantages over drought-sensitive species.

Subfields: Agronomy and Crop Science, Plant Science

View Paper: https://www.semanticscholar.org/paper/975ae31e825cb4bb3ce097d5d10426ce94917b83

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In Agronomy and Crop Science

1. E. Blagodatskaya
2. Y. Kuzyakov

In Plant Science

1. E. Blagodatskaya
2. Y. Kuzyakov
3. F. Piper
4. J. Pausch
5. B. Razavi
6. W. Cheng
7. M. Spohn
8. Petr Baldrian

Citations in the corpus

• Plant drought stress: effects, mechanisms and management (2011, unknown): “Di ff erences have also been observed in the adaptive response of root distribution to soil drying (Liu et al., 2004).”
• Mitigation of Drought Stress in Maize by Natural and Synthetic Growth Promoters (2011, result): “Hence, the plant height was affected significantly, which is in accordance with the earlier findings (Itoh & Kumara, 1986; Hamada, 2001; Liu et al., 2004).”
• Drought effects on microbial biomass and enzyme activities in the rhizosphere of grasses depend on plant community composition (2011, background): “Increase of the R/S ratio following drought under the plant monocultures indicate that plants under water stress had limited shoot growth and sustained root production by allocation of higher portion of assimilates to the roots (Liu et al., 2004).”
• Drought induces opposite changes in the concentration of non-structural carbohydrates of two evergreen Nothofagus species of differential drought resistance (2011, background): “Some plants, especially the best adapted to drought, can downregulate their carbon demands under drought conditions through responses like decreased respiration (Bryla et al. 2001; Liu et al. 2004), leaf shedding (Chaves et al. 2009), and/or limited growth (Chapin et al. 1990; Sala and Hoch 2009).”