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The proembryo stage is defined by the continued growth of the cotyledons and axis elongation. [12] In addition, programmed cell death must occur during this stage. This is carried out throughout the entire growth process, like any other development. [14] However, in the torpedo stage of development, parts of the suspensor complex must be ...
Fungi actually affect the growth of root hairs if there is water or nutrient deficiency. [13] Since both of these organisms require nutrients and water, their cooperation is essential to their mutual survival. Upon detection of deficiency, the drought stress response of the plant is triggered, causing growth of the root hairs. [12]
On top of the gradual growth of the plant, the image reveals the true meaning of phototropism and cell elongation, meaning the light energy from the sun is causing the growing plant to bend towards the light aka elongate. Plant growth and development are mediated by specific plant hormones and plant growth regulators (PGRs) (Ross et al. 1983). [10]
In contrast, a growth process that involves thickening of stems takes place within lateral meristems that are located throughout the length of the stems. The lateral meristems of larger plants also extend into the roots. This thickening is secondary growth and is needed to give mechanical support and stability to the plant. [4]
Anatomy of a flower. A flower's anatomy, as defined by the presence of a series of organs (sepals, petals, stamens and carpels) positioned according to a given pattern, facilitate sexual reproduction in flowering plants. The flower arises from the activity of three classes of genes, which regulate floral development: [8]
Since most plants carry both male and female reproductive organs in their flowers, there is a high risk of self-pollination and thus inbreeding. Some plants use the control of pollen germination as a way to prevent this self-pollination. Germination and growth of the pollen tube involve molecular signaling between stigma and pollen.
Marcello Malpighi used the microscope to study the anatomy of all kinds of organisms; his work, Anatomia Plantarum (1675), contains studies of plant anatomy and systematic descriptions of the different parts of plants. Nehemiah Grew's The Anatomy of Plants (1682) [41] displays detailed anatomical diagrams and cross sections of flowers and other ...
Botany, also called plant science or phytology, is the branch of natural science and biology studying plants, especially their anatomy, taxonomy, and ecology. [1] A botanist, plant scientist or phytologist is a scientist who specialises in this field.