Presentation on theme: "The Fruits The frut is the devoloped , fertilized, mature ovary or ovaries of a single flower. Function: to protect and nourish the seed during development."— Presentation transcript:
1The FruitsThe frut is the devoloped , fertilized, mature ovary or ovaries of a single flower.Function: to protect and nourish the seed during development.
4The Fruit is Classified into True FalseThe Gynoecium only The Gynoecium +other floral parts
5True Fruits Simple Aggregate Composite (compound) Derived from apocarpous ovary(separate carpels)e.g Star aniseFormed from the whole inflorescencee.g Mullberryشجرة التوتDerived from single ovary of one or more united carpelse.g Fennel
10Dry (with a dry or leathery pericarp) Dehiscent: split open when ripe to release the seedsIndehiscent: don’t split open when ripe (one seeded)Schizocarpic:- bi- or multilocular fruit,- split up into one seedindehiscent parts(mericarps)
11Dehiscent Fruits1-Follicle: the splitting along one side only e.g. star anise, strophanthus2- Siliqua: the splitting by2 valves to apex e.gmustard seed
27Long pepper Serosis (soross): derived from a spike (inflorescence) with a fleshy axis and perianthes of the single fruits fused together.e.g Mullberrylong pepper3-Composite fruit (cont.)Long pepper
28Histology of the fruitAs the ovary matures, its wall develops to form the pericarp, which is divided into three layers. The outermost, the exocarp, is usually a single epidermal layer. The extent of the middle layer, the mesocarp,
29The inner layer, the endocarp, varies widely, but in any single type of fruit one of the layers may be thick, the others thin.These layers are generally more conspicuous in fleshy fruits than in dry ones.
30Terminology of the fruit Carpophore: Floral axisextension betweenadjacent carpels,as in the Apiacea.Epicarp or Exocar: Outermost layer of pericarpMesocarp: Middle layer of pericarp.
31Endocarp: Innermost differentiated layer of pericarp. Pericarp: Fruit wall.Placenta: Region of attachment of seeds on inner fruit wall.
32Three-layer structure Ex.Three-layer structureshared by all fruits.The fruit skinis the outermostlayer, called theexocarp.It protectstwo inner layers: the mesocarp, and the pit, or endocarp. Together, these three layers comprise the pericarp, the thickened wall of fruit that encases and protects the seed.