Field Treatment Effects on Seed Germination and Early Growth Traits of Berseem Clover under Salinity Stress Conditions
Journal Title: Current Investigations in Agriculture and Current Research - Year 2018, Vol 2, Issue 1
Abstract
Developing seeds with a high level of tolerance against salinity and water shortage scan guarantee best seedling establishment in arid and semi-arid agricultural lands. This three-year field, laboratory and greenhouse study proposes the surfactant application to effectively prevent the detrimental impacts of severe environmental conditions on the development of parental plants. The germination rate of six parental seeds of berseem clovers (Trifolium alexandrinum L.) from I100 (100% irrigation water)/I100+s (irrigation water with surfactant, s), I75/I75+s and I50/I50+s treatments are studied under seven osmotic salinity potentials (0, -0.2, -0.4, -0.6, -0.8, -1, and -1.2MPa). Plants from seeds developed by surfactant in full and moderate limited irrigation (I100 and I75) show a favorable germination percentage when under saline stress treatments of -0.4 and -0.8MPa. The highest seedling lengths of 10.2 and 10.3cm were achieved for the seeds produced from I75 and I100+s treatments, respectively. Utilizing the surfactant across all field treatments had a positive effect on the weighted germination index compared to the counterpart treatment. In addition, Seedlings from seeds treated by surfactant in the germination tests have higher shoot/root ratios, which show the efficiency of surfactant application in promoting a better root and shoot development under saline/drought stresses.Seed performance refers to a capacity of seeds to germinate under various environmental conditions and relates to a critical period of a plant's life cycle which is eminently important in ecological and agronomic plant growth [1]. There is a general agreement that the performance and viability of seeds during their early stages of germination may be related to the conditions under which seeds are formed, developed, and matured [2]. As seed germination is the beginning of a plant's life cycle, proper seedling emergence is critically important for a decent establishment of plant population [3]. Many researchers have reported that adverse environmental conditions affect crop growth and productivity, postponing the seed germination and reducing the germination rate [4-7]. Plants experience a variety of abiotic stresses such as high/low temperatures, drought and salinity stress during their lifecycles which have a profound effect on their viability, growth, morphology, and reproduction [8]. In arid and semi-arid regions, seed germination and emergence are considered as critical stages for plant establishment and crop growth, which can elevate the crops' density and yields Shaygan 2017. In these regions, soil salinization is detrimental to plant growth and productivity [9,10].
Authors and Affiliations
F Daneshnia, MR Chaichi
Keywords
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- EP ID EP570289
- DOI 10.32474/CIACR.2018.02.000127
- Views 66
- Downloads 0
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