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2015 | 37 | 01 |

Tytuł artykułu

Hydrothermal time analysis of watermelon (Citrullus vulgaris cv. ‘Crimson sweet’) seed germination

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
This study evaluated the ability of a hydrothermal time model (HTT) to describe the kinetics of watermelon (Citrullus vulgaris cv. ‘Crimson sweet’) seed germination under different temperatures (T) and water potentials (ψ) and also to determine the cardinal temperatures of watermelon. Results indicated that ψ influenced germination rate and germination percentage. For this seed lot, cardinal temperatures were 10℃ for Tb, 28.34℃ for To and 40.8℃ for Tc in the control (0 MPa) treatment. There was a decrease in hydrotime constant (θH) when T was increased to To and then remained constant at supraoptimal temperatures (30 MPah⁻¹). Also, at temperatures above To, ψb(50) values increased linearly with T. The kT value (the slope of the relationship between ψb(50) and T exceeds To) of this seed lot was calculated as 0.076 Mpa℃ h⁻¹. Results this study show that when the HTT model is applied, it can accurately describe ψb(g) and the course of germination around Ts (R² = 0.82). Moreover, the ψb(50) was estimated to be -0.96 MPa based on this model. Consequently, the germination response of watermelon for all Ts and ψs can be adequately described by the HTT model and enabling it to be used as a predictive tool in watermelon seed germination simulation models.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

37

Numer

01

Opis fizyczny

Article: 1738 [8 p.], fig.,ref.

Twórcy

  • Department oi' Plant Molecular Physiology, Genetics and Agricultural Biotechnology Institute of Tabarestan and Sari, Agricultural Sciences and Natural Resources University, P.O. Box 48131-81344, Sari, Iran
autor
  • Department of Horticultural Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
autor
  • Department of Horticultural Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
autor
  • Department oi' Plant Molecular Physiology, Genetics and Agricultural Biotechnology Institute of Tabarestan and Sari, Agricultural Sciences and Natural Resources University, P.O. Box 48131-81344, Sari, IranDepartment oi' Plant Molecular Physiology, Genetics and Agricultural Biotechnology Institute of Tabarestan and Sari, Agricultural Sciences and Natural Resources University, P.O. Box 48131-81344, Sari, Iran
  • P. 0. Box 7. Miki-cho post office, Ikenobe 301 1-2, Kagawa-ken 761-0794, Japan

Bibliografia

  • Alvarado V, Bradford KJ (2002) A hydrothermal time model explains the cardinal temperatures for seed germination. Plant, Cell Environ 25:1061–1069. doi:10.1046/j.1365-3040.2002.00894.x
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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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