Question

What are plant hormones?​

Answer 1

Answer:

$\huge{\mathcal{\bf\purple{♡}{\pink{Answer}\purple{♡}}}}$

$\huge{\sf{\blue{\underline{\underline{ᴅᴇғɪɴɪᴛɪᴏɴ}}}}}$

Plants need sunlight, water, oxygen, minerals for their growth and development. These are external factors. Apart from these, there are some intrinsic factors that regulate the growth and development of plants. These are called plant hormones or “Phytohormones”

$\huge{\sf{\green{\underline{\underline{ғᴜɴᴄᴛɪᴏɴs}}}}}$

Plant hormones control all the growth and development activities like cell division, enlargement, flowering, seed formation, dormancy and abscission.

Based on their action, plant hormones are categorised into two categories:

• Plant Growth Promoters
• Plant Growth Inhibitors

$\orange{\mid{\fbox{\tt{Hope it's helpful ♡♡}}\mid}}$

Answer 2

Question :-

✦ What are plant hormones?

Solution :-

◆━━━━━━◆❃◆━━━━━━◆⠀⠀⠀

➱ Plant hormones or Phytohormones are naturally occurring chemical substances present in plants and bring about control and coordination of various activities in them. These are called plant hormones or “Phytohormones”.

◆━━━━━━◆❃◆━━━━━━◆⠀

☞ Extra shots :-

↬ There are four major types of plant hormones . which are involved in the control and coordination  in plants. These are :

1)Auxins

2)Gibberellins

3)Cutokinins

4)Abcisic acid

1)Auxins are the plant hormones which promote cell enlargement and cell differentiation. Auxins also promote fruit growth. Auxin hormone is responsible for phototropic and geotropic responses of plants.

2) Gibberellins are plant hormones which promote cell enlargement and cell differentiation in the presence of auxins. Gibberellins help in breaking the dormancy in seeds and buds. They  also promote fruit growth. Gibberellins stimulates elongation of shoots of various plants

3) Cytokinins are plant hormones which promote cell division in plants.They also help in breaking the dormancy in seeds and buds. The delay the ageing of leaves.Cytokinins promote opening of stomata .

4)Abscisic acid (ABA) is a  plant hormone which functions mainly as a growth inhibitor. Abscisic acid promotes the dormancy in seeds and buds [ this is the opposite of breaking the dormancy]. It also promotes closing of stomata. Abscisic acid promotes falling of leaves.

_____________________