Influence of Salinity and Temperature on Germination of Trifolium repens

Saberi, Mohammad Hossein; Ghaleno, Mohammad Reza Dahmardeh; Sardo, Mojtaba Solaimani; Tarnian, Farajollah

doi:10.5539/mas.v6n9p34

Cited by 2 publications

(1 citation statement)

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“…Therefore, it is not surprising that the threshold salt concentration was estimated in this study to be 273 mM. That value is similar to those found for other forage cereal plants like wheat [20], sorghum [12] [21] and other forage grasses [22] and higher than the values observed for forage legumes such as white clover [23] and alfalfa [24]. As in the temperature experiment, in the salt experiment, there were no significant trends in terms of dry weight (Figure 2(g)), indicating once again that the dif-ferences observed in seedling length and seedling fresh weight were due to the absorption of water by the seedlings grown in the dark.…”

Section: Discussionsupporting

confidence: 89%

The Effects of Several Types of Induced Abiotic Stress on <i>Cephalaria joppensis</i> Germination under Controlled Conditions

Daklo-Keren¹,

Abu-Aklin²,

Cohen³

et al. 2018

AJPS

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The recently domesticated species, Cephalaria joppensis (CJ), is emerging as a new alternative forage crop in Israel. It has high biomass potential and nutritional values that are comparable to forage wheat. However, CJ emerges slowly under cold conditions, which hinders its development as a major winter crop. Additional tolerance for abiotic stress would improve its performance as a forage crop. We examined the effects of several abiotic factors (i.e., cold, salinity, drought and pH) on CJ germination under controlled conditions. The effect of temperature was studied by incubating seeds at different temperatures between 7˚C and 35˚C. The effects of salinity, osmotic potential and pH were tested by incubating seeds at different NaCl, PEG and pH levels, respectively. Temperature, salinity and osmotic potential significantly affected germination; whereas pH did not. Temperature did not affect the final proportion of germinated seeds, but did affect other germination-rate variables, indicating that germination rate might be the limiting factor under field conditions. Salinity also affected germination-rate variables, but not the proportion of seeds that germinated. Notably, CJ was found to be relatively resistant to high salt concentrations, with a 273 mM NaCl threshold for germination, indicating its potential as a relatively salt-tolerant forage crop. Both the proportion of germinated seeds and the germination rate were highly sensitive to the osmotic-potential treatments, indicating that drought resistance will remain the biggest challenge for CJ. This study provides baseline data for a rapid and efficient system for further screening for abiotic-stress tolerance among wild and cultivated lines of CJ.

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