Nayyereh Ghorbani; Esmaeil Chamani; Ali Akbar Shokoohian; Seyyedeh Sanaz Ramezanpour
Abstract
Biochemical diversity is a manifestation of geographical area and environmental change. In the present study, 16 ecotypes of yellow flag species were identified and collected through field studies. The ecotypes were identified and then grouped into three populations based on their geographical locations. ...
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Biochemical diversity is a manifestation of geographical area and environmental change. In the present study, 16 ecotypes of yellow flag species were identified and collected through field studies. The ecotypes were identified and then grouped into three populations based on their geographical locations. Using spectrophotometric methods, eight biochemical properties were measured. These were chlorophyll a, chlorophyll b, total chlorophyll, antioxidant capacity, carotenoids, total phenol, flavonoids, and anthocyanin content. The biochemical traits were analyzed in a completely randomized design in three replications using SAS software and principal component analysis via SPSS software. The analysis of variance showed significant differences between the ecotypes in terms of biochemical traits (p<0.05; p<0.01). Photosyntheti-c pigments occurred maximally in ecotype Q, phenol and flavonoids in ecotype K, antioxidant capacity in ecotype O, and anthocyanin content in ecotype L. The populations were divided into three main groups by cluster analysis. Correlation analysis showed significant, positive correlations between chlorophyll a and total chlorophyll (r = 90%), total chlorophyll and carotenoids (r = 67%), as well as phenol content and flavonoid content (r = 56 %). The results indicated significant bioch-emical diversity in the ecotypes.
Masoud Haghshenas; Mohammad Javad Nazarideljou; Akbar Shokoohian
Abstract
The moderating role of salicylic acid (SA) and putrescine (PUS) as plant growth regulators (PGRs), on the growth parameters and phytochemical and qualitative characteristics of strawberry fruit 'Selva' under osmotic stress was investigated under soilless culture. The osmotic potential (salinity) of the ...
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The moderating role of salicylic acid (SA) and putrescine (PUS) as plant growth regulators (PGRs), on the growth parameters and phytochemical and qualitative characteristics of strawberry fruit 'Selva' under osmotic stress was investigated under soilless culture. The osmotic potential (salinity) of the nutrient solution containing different NaCl concentrations (0, 7.5, 15, 30 and 45 mM) and foliar application of PUS (0 and 1.5 mM) and SA (0 and 1.5 mM) were studied. The results showed a significant decrease in plant leaf area (79.6%), total chlorophyll content (48%), fruit yield (73.5%), leaf relative water content (33%), total protein (33.4%), total phenol (7.8%), and vitamin C content (24.5%) under osmotic stress. Moreover, peroxidase (POD) and superoxide dismutase (SOD) enzymes activity, leaf ion leakage, and soluble carbohydrate and proline content increased significantly under osmotic stress. Application of PGRs had a significant effect on all the studied traits (except for SOD activity). Interactive effects of salinity and PGRs were significant on all the traits except for leaf ion leakage, POD activity, soluble carbohydrates, and protein. The highest total phenol and vitamin C contents were obtained with 15 mM salinity along with foliar application of PGRs. In conclusion, foliar application of PUS and SA ameliorate negative effects of salt stress on growth, yield, and quality of strawberry fruit.