Introductory Crop Physiology

Other identified plant growth regulators

Other Plant growth Regulators

Other identified plant growth regulators are
1. Salicylic acid

• It activates genes in some plants that produce chemicals that aid in the defense against pathogenic invaders.
2. Jasmonates

• They are produced from fatty acids and seem to promote the production of defense proteins that are used to fend off invading organisms.
• They are believed to also have a role in seed germination, and affect the storage of protein in seeds, and seem to affect root growth.
3. Plant peptide hormones

• They encompasses all small secreted peptides that are involved in cell-to-cell signaling.
• These small peptide hormones play crucial roles in plant growth and development, including defense mechanisms, the control of cell division and expansion, and pollen self-incompatibility.
4. Polyamines

• They are strongly basic molecules with low molecular weight that have been found in all organisms studied thus far.
• They are essential for plant growth and development and affect the process of mitosis and meiosis.
5. Nitric oxide (NO)

• It serves as signal in hormonal and defense responses.