Question

What is the name of the plant hormone which causes the fruit to ripen?

Answer 1

A group of molecules in multicellular organisms which are transported to regulate physiology and behaviour is called hormone. They are used to communicate between organs and tissues. They are also known as chemical messengers in our body. They work slowly over time which are used for many physiological purposes.

Complete answer:
Endocrine glands are a group of cells which makes hormones. Pituitary, pineal, thymus, pancreas are some of the endocrine glands. A group of molecules in multicellular organisms which are transported to regulate physiology and behaviour. They are used to communicate between organs and tissues.

Hormones in our body regulate digestion, respiration, metabolism, respiration, excretion, etc . Plants also have hormones which modulate all aspects of development from germination to senescence. Organic substances which regulate plant growth and development are plant hormones. A large number of synthetic chemical compounds are called as plant growth regulators (PGRs).

Examples of some plant hormones are:
- Auxin,
- Gibberellins(GA),
- Abscisic acid (ABA),
- Cytokinin (CK),
- Ethylene (ET), etc.

Ethylene, the only gaseous plant hormone, is responsible for the ripening of fruits. Fruits and tissues which are going in ripening and senescence respectively produce large amounts of ethylene. For agricultural purposes, ethephon is used as a source of ethylene.

Note: The action of ethylene on leaf growth may be auxin-dependent or auxin-independent. Hormonal coordination is an important aspect, which regulates leaf growth processes. Auxin induces ethylene production, and many effects of exogenous auxins are, in fact, ethylene responses