The effect of methyl jasmonate and Putrescine on secretory sacs structure in stored orange Valencia (Citrus sinensis. var.Valencia) fruit

This experiment was carried out to determine effect of putrescine and methyl jasmonate on sacs secretory structure in stored orange (Citrus sinences L.) “Valencia” fruit. Oranges were treated with 0 (control), 2.5 and 5 mlM putrescine and 0 (control), 10 and 20µmol methyl jasmonate and then stored at 5±1°C, 85-90 % relative humidity for 4 month. Microtomey and handy sections were prepared and Studied. Antogeny changes øof formation secretory sacs in orange Valencia were in 4 steps: start structuralization sac, formation space between cell, expansion of the cavities, and finally maturity. Location formation sacs in under epidermis layers, and deeper, too. Preliminary, formation sacs as Schizogeny and finally lysigeny. In microtomey sections, number sacs were counted in different growing stages. No difference was observed in longitudinal, transverse axis sacs and number sacs fruit treated. Number sacs and longitudinal and transverse axis of exocarp (flavedo) in control and treated fruits, investigated by stereomicroscope and no Significant difference was observed between microtomey and handy sections.