Quantification of Germination Response of Millet ( Panicum miliaceum L.) Seeds to Water Potential and Priming using Hydrotime Model

Cercetari Economice in Moldova

article

S.A. Tabatabaei¹  N. Bayatian²  S. Nikoumaram³  O. Ansari⁴ 

[1] Seed and Plant Improvement Research Department, Yazd Agricultural and Natural Resources and Education Center;Seed Science and Technology, University of Birjand;Seed Science and Technology, University of Tehran;Seed Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources

关键词: base temperature;    base waterpotential;    germination prediction;    hydrotime;    Panicum miliaceum L;   

DOI  :  10.2478/cerce-2019-0018

学科分类：农业科学（综合）

来源: Universitatea de Stiinte Agricole si Medicina Veterinara "Ion Ionescu de la Brad"

【 摘 要 】

Seed germination is a complex biological process that is influencedby different environmental physicalfactors including temperature, waterpotential, salinity, pH and light, as well asintrinsic genetic factors. In suchenvironments, the water needed forgermination is available for only a shorttime, and consequently, successful cropestablishment depends not only on rapidand uniform germination of the seedlot,but also on its ability to germinate underlow water availability. All of theseattributes can be analyzed through thehydrotime model (HT). Millet (Panicummiliaceum L.) is cultivated in arid andsemi-arid regions of Iran. Therefore, inthis study, using the hydrotime modelingapproach, germination response of milletto priming (water and gibberellin 50 ppmat 15°C for 24 h) and water potential(0, -0.3, -0.6, -0.9, and -1.2 Mpa) wasstudied. Hydrotime (HT) model werefitted to cumulative germination of seedsand recorded in germination tests carriedout at different water potentials (0, -0.3,-0.6, -0.9 and -1.2 MPa) and primingtreatments (control, hydropriming andhormone priming). Results showed that,germination of millet decreasedsignificantly with reduction of osmoticpotential. Results indicated that the hydrotime constant (θH) for control, hydropriming and hormone priming were 0.89,0.79 and 0.67 MPa d, the water potential(Ψb(50)) for control, hydropriming andhormone priming were -0.89, -0.94 and-1.11 MPa, respectively. Results indicatedthat the use of hydrotime model ingermination prediction could be useful toprovide more accurate estimates for the timing of sowing and management ofmillet.

【 授权许可】

Unknown