Alleviation of Heat Stress in Tomato by Exogenous Application of Sulfur

Temperature is a key factor influencing plant growth and productivity, however sudden increases in temperature can cause severe consequences terms of crop performance. We evaluated the influence elementary sulfur application on physiology two tomato genotypes (“Ahmar” “Roma”) grown chambers (at 25 45 °C). Plants were sprayed with 2, 4, 6, 8 ppm days after sowing (untreated plants kept as control). “Roma” cultivar receiving 6 exhibited maximal shoot root biomass values followed by those 4 under both conditions. Maximal CO2 index, photosynthetic rate, transpiration greenness index (188.1 µmol mol−1, 36.3 m−2 s−1, 1.8 H2O 95 SPAD, respectively) observed at °C, indicating positive influences physiology. Similarly, maximized proline, nitrogen, phosphorus, potassium contents leaves temperatures. The differences between control sulfur-treated heat stress indicate possible role mitigating stress. Overall, our results suggest that best dose to alleviate enhance morphological, physiological, biochemical attributes plants.