Seedling Functional Types and Cotyledons Shape Some Species of Woody Plant

Abstract

ABSTRACT
 Woody plant produce small to large seeds which can affect germination process. Cotyledons as an important food source for early growth of seedlings. The position, function, and type of cotyledons when seeds germinate varies. This research aimed to determine cotyledons characters of woody plant seedlings collection in Bogor Botanic Gardens. The position, function and type of cotyledons were observed for 65 species of seedlings.This research used an observative method and was analyzed descriptively.The position of cotyledons when the seeds germinate are epigeal (above the ground) and hypogeal (remain in the soil). The epigeal cotyledons type found in 44 species that is higher than hypogeal cotyledons type (21 species). The function of cotyledons for seedlings is to reserve food or photosynthesis. Species with cotyledon reserve type were more than foliar cotyledons type (43 species and 22 species, respectively). The proportion of seedling types CER (cryptocotylar-epigeal-reservoir), CHR (cryptocotylar-hypogeal-reservoir), PEF (phanerocotylar-epigeal-foliaceous), PER (phanerocotylar-epigeal-reservoir), PHR (phanerocotylar-hypogeal-reservoir) were 3.08%, 16.92%, 33,85%, 29,23%, 16,92%, respectively.

Short communication: Germination monitoring of selected Annonaceae seeds: Seed bank collections of Purwodadi Botanic Garden, East Java, Indonesia

“…This study showed the seed coat was separated from the cotyledons. Epigeal type with seed coat detached from cotyledons is called phanerocotylar (Handayani 2021). According to Handayani (2017Handayani ( , 2019, the type of seed germination from the Annonaceae family is generally epigeal.…”