Abstract
The seed coat furnishes protection with a thick cuticle, tannin cells, mucilage, and a hard sclerotesta. The external layer of the seed coat is a sarcotesta; a thick cuticle covers the external walls of its epidermal cells. This epidermis bears stomates and, in the early stages, trichomes. The subepidermal cells have druses. Starch grains are abundant in the sarcotesta from June through August, but they disappear during dispersal in September. The parenchyma is interrupted by mucilage canals lined by epithelial cells. Tannin cells are found in the sarcotesta, sclerotesta, and pachychalaza. Ten sectors of an areole in the sclerotesta around the micropyle may correspond to the tips of the integumentary segments in some fossil plants, such asGenomosperma kidstonii.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
