ISHS Acta Horticulturae 465: IV International Peach Symposium
QUALITY OF PEACH FRUIT IN RELATION TO CARBON SUPPLY |
| Authors: | M. Souty, M. Reich, G. Albagnac, M. Génard |
| Keywords: | Maturation, Sugars, Organic acids |
| Abstract:
Evolution of growth and of some physiological and biochemical criteria in peach fruit (cv Suncrest) were investigated in relation to carbon supply: normal cultural conditions (30 leaves per fruit, T30) or very poor supply (6 leaves per fruit, T6). While T30 fruits had a typical and normal growth, T6 fruits grew very slowly to reach a lower weight (75 g) than T30 fruits (180 g). In T6 fruits autocatalytic production of ethylene was delayed (two weeks later) and remained much lower; glucose, fructose and especially sucrose accumulated more slowly; the metabolism of malate and citrate anions was modified. So T6 fruits were less sweet and more acid than T30 fruits, corresponding to a poor organoleptic quality. Trees suffering from nutritional stress cannot produce fruits with good quality. | |
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