1.BotanyA leaf of the embryo of a seed plant, which upon germination either remains in the seed or emerges, enlarges, and becomes green. Also calledseed leaf. 2.AnatomyOne of the lobules constituting the uterine side of the mammalian placenta, consisting mainly of a rounded mass of villi....
How do cotyledons develop? A cotyledon is part of the embryo within the seed of a plant. Often when the seed germinates, or begins to grow, the cotyledon may become the first leaves of the seedling. ... The cotyledons are formedduring the process of embryogenesis along with the roots a...
Thecalciumfrom eggshells is also welcome in garden soil, where it moderates soil acidity while providing nutrients for plants. ... Tomatoes that have a handful of eggshell meal worked into the planting site are not likely to develop blossom end rot, and plenty of soil calcium reduces tip burn...
Photomorphogenesis is the process by which plants grow and develop in response to light signals. This process is mediated by a sophisticated network of pho... YJ Han,PS Song,JL Kim - 《Journal of Plant Biology》 被引量: 57发表: 2007年 On the Role of Abscisic Acid in Phytochrome-mediated...