Keywords: Drought, nitrofoska, acetyl salicylic acid (ASA), photosynthesis, stomatal conductance, transpiration.
In order to evaluate physiological and nutrimental response in ‘Diamante’ peach leaves, in Chapingo, Mexico. Drought, acetyl salicylic acid (ASA) 1.8 g-litro-1 and nitrofoska 20 g-litro-1 treatments were supplied in 1.5 year old trees in a greenhouse, ASA and nitrofoska were sprayed in June 3, 19, and July 4. Photosynthesis, respiration, transpiration, stomatal resistance, mesophyl conductance and leave temperature evaluations were at one h, 24 h and 30 days after sprays (DAS). Proline, total sugars, reducing sugars, reducing nitrogen, chlorophyll a, b and total, nitrogen, phosphorous, potassium, magnesium, copper, iron and zinc were evaluated in leaves at 16 DAS. It was found that drought decreased in plants the photosynthesis, mesophyl conductance and leaf temperature at 24 h DAS than the control. Nitrofoska increased in leaves the photosynthesis than drought at one and 24 h DAS. It was found that iron was higher than other treatments. Finally flower also number increased compared to ASA, and it hadn’t different response than the control.