Growth and photosynthetic parameters of saccharine sorghum plants subjected to salinity

Abstract

Plants are often exposed to abiotic stresses such as salinity, which represents a barrier to the cultivation of agricultural species mainly in arid and semi-arid regions. This study evaluated the development of four saccharine sorghum genotypes for tolerance to different salinity levels under greenhouse conditions. The experimental design was a randomized complete block arranged in a 5 × 4 factorial scheme, which corresponded to five levels of irrigation water salinity [electrical conductivities of 0.5 (control), 2.5, 5.0, 7.5, and 10.0 dS m -1 ] and four saccharine sorghum genotypes (CSF 11, CSF 15, P 76 and P 298), with five replicates. The plants were evaluated for dry mass production, leaf area, height, stalk diameter, leaf gas exchange and relative chlorophyll content. The growth and leaf gas exchange measurements of the saccharine sorghum plants were significantly affected by salinity stress. Among the genotypes, CSF 11 and CSF 15 exhibited smaller reductions in growth, whereas P 298 showed the greatest reduction. These findings show that genotype CSF 11 can be classified as the most tolerant to salt stress, and genotype P 298 is the most sensitive.

Potential of plant growth promoting bacterial consortium for improving the growth and yield of wheat under saline conditions

“…Salinity also negative impact on chlorophyll contents of wheat and this effect was more pronounced at high salinity concentration. It has already been described by various researchers that salinity causes a decline a chlorophyll contents that ultimately affect the photosynthesis rate of the plant ( Aquino et al, 2007 ; Silva et al, 2019 ). However, in present study, it has been observed that under salinity stress, the application of multi-strain bacterial consortium was found to be an effective strategy to improve the photosynthetic pigments that ultimately improve the photosynthesis rate of the plant.…”

Abiotic Stresses in Plants and Their Markers: A Practice View of Plant Stress Responses and Programmed Cell Death Mechanisms

“…The profile of the leaves of a control plant (wild specimen or untreated specimen) must be carefully observed in relation to the treated specimens. To provide a quantitative parameter, it is possible to count the leaves with symptoms in relation to the asymptomatic leaves [151].…”

Produtividade E Características Biométricas De Sorgo Sacarino Sob Torta De Filtro / Productivity and Biometric Characteristics of Sorghum Under Filter Pie

“…Resultados positivos vem sendo elucidados na literatura contemporânea sob a resposta do sorgo sacarino submetido as condições de salinidade, sob condições diferentes de adubação mineral, avaliação da resistência a broca da cana, efeitos da população de plantas, data da semeadura, época da colheita, entre outros (FIORINI et al, 2016;BARCELOS et al, 2018;MONTEIRO et al, 2018;SILVA SÁ et al, 2018;SILVA et al, 2019). Contudo, há poucos estudos com o uso de coprodutos da indústria sucroalcooleira, como a torta de filtro, na cultura do sorgo sacarino.…”