Studies on salinity tolerance of two peanut cultivars in relation to growth, leaf water content. some chemical aspects and yield.
Year: 2010
Type: article
Abstract: This field experiment was carried out through the successive growth seasons (Summer, 2008
and 2009). In El-Tina Plain area to study salinity tolerance of two peanut cultivars namely Gregory and
Giza 6 and the soil salinity level effect on plant growth, yield, leaf water content, chemical composition
and other parameters. Salinity levels of the three used soils were 7.55, 9.20 and 12.5dSm-1. The studies
treatments were disturbed among the experimental plets in split design with six replicates. All farming
processes for peanut plants were carried out according to recommendations of Ministry of Agriculture. At
flower stage, the plant samples were taken from three replicates for estimate some vegetative growth
parameters and chemical variables. On the other hand, other plants samples were taken from the other
three replicates at maturity stage where its used to estimate the yield and the chemical composition of both
straw and seeds. The obtained results cleared that, all studied characters of growth, total water content,
free water content, relative water content, leaf water potential, photosynthetic pigments, total
carbohydrates and non soluble carbohydrates showed a significant decrease by increasing salinity levels.
Moreover data recorded a significant increase in total soluble sugars, leaf water deficit, bound water
content, membrane integrity, proline and total free amino acids concentrations and enzyme activity as a
result of increasing salt stress conditions. Gregory variety had the best growth and yield, and also its was
more stable in its physiological and chemical component under salt stress conditions compared to variety
Giza 6. So, Gregory variety was more tolerance to salinity stress compared to Giza 6 variety. The
obtained data also show that, the yield of both straw and seeds and also its content of N, P and K were
decreased with the increase the levels of soil salinity. Such decrease was found with oil and protein
content of seeds. In two growth seasons, the previous decrease found with Gregory cultivar was lower
than that found with Giza 6 cultivar.
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W188433077