Biologia plantarum 51:181-184, 2007 | DOI: 10.1007/s10535-007-0036-6

Growth, abscisic acid content, and carbon isotope composition in wheat cultivars grown under different soil moisture

T. Wang1, X. Zhang1, C. Li1,*
1 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, P.R. China

Changes in dry matter accumulation and allocation, abscisic acid content and carbon isotope composition of three wheat cultivars from dry, middle and wet climate regions were recorded at full maturity after exposure to different watering regimes (100, 50 and 25 % field capacity). Compared with the wet climate cultivar, the dry climate cultivar showed lower stem height, total leaf area, total dry biomass and total grain dry mass, and higher root/shoot ratio, abscisic acid content and carbon isotope composition under all watering regimes. Both water-limited treatments significantly reduced leaf growth and increased dry matter allocation into the roots leading to a significant raise of root/shoot ratio in all cultivars tested. In addition, drought affected morphological and physiological properties more in the dry climate cultivar than in the wet climate cultivar.

Keywords: dry matter accumulation and allocation; Triticum aestivum; water use efficiency
Subjects: abscisic acid (ABA); carbon isotope discrimination (δ13C); cultivar and genotype differences; growth analysis, plant development, biomass and yield enhancement; soil moisture; Triticum aestivum; water use efficiency (WUE); wheat

Received: June 29, 2005; Accepted: December 5, 2005; Published: March 1, 2007Show citation

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Wang, T., Zhang, X., & Li, C. (2007). Growth, abscisic acid content, and carbon isotope composition in wheat cultivars grown under different soil moisture. Biologia plantarum, 51(1), 181-184. doi: 10.1007/s10535-007-0036-6.
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