Temperature Salinity Temperature And Salinity Essay

870 Words Mar 7th, 2016 4 Pages
Gorai M, Neffati M, and Tlig T (2007). Germination responses of Diplotaxis harra to temperature and salinity. Flora 203: 421–428

2a) Successful colonization of plant species is reliant on fruitful seed germination, which is consequently influenced by various environmental factors such as temperature, salinity and soil moisture. The authors hypothesized that temperature is a determining factor in relation to germination behaviour, affecting seeds’ tolerance to salt. Testing germination response in Diplotaxis harra under a wide range of salt levels and temperatures, the authors predicted that the seeds will suffer reduced or delayed germination as a result of increased salinity levels. However, the effect of salinity is more limited at optimum germination temperature. Additionally, the authors predicted temperature affects recovery germination of seeds exposed to saline solutions.

2b) The results of the germination tests support the hypothesis that temperature and salinity affect germination behaviour of D. harra. At an optimum temperature of 15 degrees celsius, 71% percentage of germination was observed. Consequently, temperatures increases or decreases from this optimum range, resulted in inhibited germination. Increasing salinity levels contributed to delayed germination, however suitable temperature requirements resulted in less pronounced inhibition. This supports the prediction that the effects of temperature is more detrimental to germination behaviour than…

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