A morphological and physiological investigation of the self-incompatibility of the Orlando tangelo /

Abstract

Concentrations of inhibitor (R^0.78-0.94) in ovaries and styles of 'Orlando' tangelos at various dates following non-, self-, and crosspollination 59 iv LIST OF FIGURES F± Z ar°P age !• Pollen tube in * Orlando 1 ovule after crosspollination ..... 40 2. Embryo sac in 1 Orlando* ovule penetrated by pollen tube after cross-pollination 41 3. Multinucleate endosperm in * Orlando* ovule after cross-pollination # 42 4. Undivided zygote in * Orlando* ovule 40 days after cross-pollination in 1963 43 5* Blue stained callose plugs in pollen tubes in *Orlando» style6. The percent of non-, self-, and cross-pollinated ovaries that abscised between sampling dayŝ 1963 46 7. A. Histograms of 4 concentrations of IAA 58 12.