NUTR 214 Lecture Notes - Lecture 3: Rechargeable Battery, Chloroplast, The Plant Cell
15 Oct 2016
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Document Summary
Botanically, a fruit is a matured ovary of a flower, including seeds and adjacent parts. Freshly fruits are classified in to 3 groups depending on the type of flowers from which they develop and their seed structure: simple fruits: derived from one flower. Drups : peach, plum, cherry , olive, apricot. Citrus fruits : orange, grapefruit, lemon: aggregate fruits: formed from several ovaries in one flower. Raspberry, blackberry, strawberry (many fruits together and each seed is a fruit: multiple fruits: formed from a cluster of many flowers. Tomato and squash: eg of fruits used as veges, come from flowers. Avocado: fruit, usually not used in sweet recipe (avocado oil fruit oil) The plant cell (similar in fruit and veges) Cell wall: (2 layers), hardly distinguish unless microscope. (fiber in cell wall) Primary cell walls --- thin and contain: cellulose: indigestible polymer, hemicellulose: less polymerized than cellulose (degraded by alkali soften texture. Heat can also degrade: pectic substances: protopectin, pectin .
