Exercise B Starch Grains

Plant cells have several unique organelles (see Laboratory Topic 1). Within plant cclls arc the plastids, a family of membrane-bounded organelles. Two classes of this group are chloroplasts and chromoplasts. Chloroplasts arc the green, chlorophyll-containing organelles of photosynthesis; chromoplasts store the pigments of red, yellow and orange that color may flowers and fruits. Another type of plastid is the Icucoplast, which is colorless. A lcucoplast that stores starch is an amyloplast The starch grains within an amyloplast may have recognizable shapes and other distinguishing properties that can prove useful as identification tools in archaeology and forensics (fig. 13.2). One useful characteristic of starch grains is dieir appearance in polarizing light. A ¿Maltese cross is seen in each starch grain; its appcarancc varies somewhat with species.

Was this article helpful?

0 0
Building Your Own Greenhouse

Building Your Own Greenhouse

You Might Just End Up Spending More Time In Planning Your Greenhouse Than Your Home Don’t Blame Us If Your Wife Gets Mad. Don't Be A Conventional Greenhouse Dreamer! Come Out Of The Mould, Build Your Own And Let Your Greenhouse Give A Better Yield Than Any Other In Town! Discover How You Can Start Your Own Greenhouse With Healthier Plants… Anytime Of The Year!

Get My Free Ebook

Post a comment