Water deficit-induced changes in mesocarp cellular processes and the relationship between mesocarp and endocarp during olive fruit development

摘要: Summary A field experiment was conducted during two consecutive growing seasons to determine and quantify the growth response of olive (Olea europaea L. cv. Leccino) fruit its component tissues tree water status. Pre-dawn leaf potential (Ww) volume were measured at about weekly intervals, fresh weight (FW) dry (DW) 15, 20 21 weeks after full bloom (AFB). Fruit anatomical sections prepared 8, 15 AFB for area determinations cell counts. well-watered trees (average Ww = � 0.97 MPa) increased rapidly reached greatest final size, that from most stressed 2.81 grew slowly smallest. In general, equatorial transverse areas mesocarp with increasing Ww, this more evident than AFB. By AFB, values three times higher those 8 The endocarp FW DW did not increase between Within each sampling date area, responded weakly Ww. mesocarp-to-endocarp ratio (FW DW) regardless status, mainly due growth. both years low mesocarp-toendocarp found below 2.5 MPa. mesocarp, size responsive deficit number. At number cells in unaffected by deficit, whereas decreased, although slightly, fruits sampled which < 3.0 showed a linear decrease level decreased as MPa seemed above