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Drought induced physiological and biochemical responses in Solanum lycopersicum genotypes differing to tolerance

100%

Kusvuran S., Dasgan H. Y.

Acta Scientiarum Polonorum. Hortorum Cultus

2017

tom 16

nr 6

Drought stress is one of the most serious abiotic stresses that cause reduction in plant growth, development and yield in many parts of the world. The plants have developed different morphological, physiological and biochemical mechanisms to withstand drought stress. The present study investigated different levels (S1: 100% of field capacity – Control; S2: 50% of field capacity –moderate stress; S3: 0% of field capacitysevere stress) of drought stress on oxidative damages and variations in antioxidants in the two tomato genotypes Tom-163 (drought-sensitive), Tom-143 (drought-tolerant) to elucidate the antioxidative protective mechanism governing differential drought tolerance. The shoot fresh weight, shoot height, leaf number and area, relative water content (RWC) were reduced with different level of drought stress. However, this reduction clearly occurred in Tom-163 (sensitive). Antioxidative enzyme activities such as superoxide dismutase, catalase, ascorbate peroxidase and glutation reductase had a greater increase in tolerant genotypes (Tom-143) than in sensitive ones (Tom-163). The level of lipid peroxidation was measured by estimating malondialdehyde content. Lipid peroxidation increased with rising drought level in both genotypes although Tom-143 was the least affected when compared with the Tom-163. Total phenolic and flavonoid contents increased in tomato genotypes under S2 and S3 conditions. The highest total phenolic and flavonoid contents were attained in Tom-143 subjected to S3 treatment. These results indicated that antioxidant defense systems, osmolytes and secondary metabolites play important roles in tomato during drought stress.

Using of microbial fertilizer as biostimulant alleviates damage from drought stress in guar (Cyamopsis tetragonoloba (L.) Taub.) seedlings

100%

Kusvuran A., Kusvuran S.

International Letters of Natural Sciences

2019

tom 76

Drought is a significant environmental stress that limits plant growth and yield. In this study, an investigation of guar, grown under different drought level conditions [(S0: 100% of field capacity), S1 (depletion of 75% the available water holding capacity), S2 (depletion of 50% the available water holding capacity), S3 (depletion of 25% the available water holding capacity), S4 (no applied irrigation water)] with regards to the impact of Chlorella vulgaris based microbial fertilizer on physiological, morphological, and enzymatic activity was performed. Microbial fertilizer applications significantly increased shoot length, fresh and dry weight of the shoot and root, and leaf number and area of guar plants compared to the only drought stress treatments. In addition, following the above-mentioned procedures, there were significant increases in the relative water content, total phenolic and flavonoid contents, superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutation reductase (GR) activity. However, the malondialdehyde (MDA) content were significantly decreased. Hence, the results support the administration of a foliar application to the microbial fertilizer containing microalgae in order to increase the guar plant’s defense system, enabling it to tolerate the negative effects resulting from drought stress.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 International Letters of Natural Sciences

2 Kusvuran S.

1 Dasgan H. Y.

1 Kusvuran A.

1 2019

1 2017

Wyniki wyszukiwania

Drought induced physiological and biochemical responses in Solanum lycopersicum genotypes differing to tolerance

Using of microbial fertilizer as biostimulant alleviates damage from drought stress in guar (Cyamopsis tetragonoloba (L.) Taub.) seedlings