Comparison of some physiological responces to salinity and normal conditions in Sugar Beet 

Abstract

This study was carried out in the Agricultural Research Center of West Azerbaijan, Iran in 2016. In this research, variations in different physiological and yield traits measurement of total dry weight, shoot fresh weight, shoot dry weight, root fresh weight, root dry weight, relative water content, relative water loss, root length, leaf area, root/shoot ratio, specific leaf weigh, sodium content, potassium content and proline were investigated in normal and saline condition. The results indicated that in saline condition, total dry weight, root fresh weight, shoot dry weight, root/Shoot ratio, specific leaf weight, root length, proline and Na content were increased and the other traits were decreased. Study of correlation of traits showed that most significant difference between the two conditions was observed for the root/shoot ratio, so that, this trait has negative significant relation with total dry weight, shoot fresh weight, shoot dry weight, root fresh weight, root dry weight, relative water content, leaf area, root length, specific leaf weight in saline condition, but in normal condition correlation is positive and significant only in the total dry weight, root fresh weight, shoot dry weight and root dray weight and was not significant in the other traits. Step-wise regression analysis for total dry weight as dependent variable revealed that in normal condition, root fresh weight, shoot fresh weight and Na content expound of 93.1% and in saline condition root fresh weight, root length, Na content and proline explicate of 81.3% of total variation exist in total dry weight. Therefore, it is suggested to consider different traits in breeding programs for normal and saline conditions.

Photosynthetic performance and nutrient uptake under salt stress: Differential responses of wheat plants to contrasting phosphorus forms and rates

“…To minimize the negative effect of salt stress, the plant developed phenotypic plasticity ( Rewald et al., 2012 ). Contrary to what has been reported in previous studies, that the root/shoot ratio increased in stress conditions ( Khorshid et al., 2018 ; Rahimi et al., 2021 ), in our investigation, this ratio decreased for all P treatments. This reduction was more relevant at 45 ppm of P for Ortho-A followed by Poly-B and Ortho-B which were similar for both doses of P. Thus, biomass was more allocated in shoots than in roots.…”

Evaluation of Germination, Emergence and Physiological Properties of Sugar Beet Cultivars Under Salinity

“…On the other hand, Mohican and Orthega exhibited better performance as NaCl levels increased. Our results confirmed the findings of Mostafavi (2012), Jamil & Rha (2004) and Khorshid et al (2018). They determined a significant reduction in root, shoot length and seedling fresh weight due to increasing salinity.…”

“…Moreover, relative water content, electrolyte leakage and chlorophyll content were recently used for indicators of salinity in barley (Ashraf 2004), in wheat (Farooq & Azam 2006, Jamali et al 2015. In sugar beet, decreased relative water content and chlorophyll content in leaves (Khorshid et al 2018) and increased electrolyte leakage under NaCl were reported by Wang et al (2017) but Skorupa et al (2019) determined no changes in chlorophyll content. Due to the controversial reports and lack of sufficient researches, physiological traits needs to be confirmed by comparing salt stress sensitive and tolerant cultivars in sugar beet.…”