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What are phytohormones ?...

What are phytohormones ?

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These are chemical substance which is produced naturally in plants and are capable of translocation and regulating one or more phyiological process when present in low concentration.
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P, Q, R and S are four major types of phytohormones. P is a phytohormone which functions mainly as a growth inhibitor. It promotes the wilting and falling of leaves. Q, R and S are phytohormones which all promote growth of plant in various ways like Q is responsible for the phototropism in plants while Ris involved mainly in shoot development. The phytohormone S helps in breaking the dormancy of seeds and buds. What is P, Q, R and S.

Phytohormones are

[A]: Plants hormones are called phytohormones [R]: They increase rate of reaction & accelerate growth.

Which one of the following plant hormone (phytohormone) is know as a stress hormone?

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List the functions of various phytohormones.

Which of the following type of phytohormones resemble the nucleic acids in some structural aspects

Which of the following phytohormones replaces female flowers with male flowers on monoecious plants of cucurbits ?

A natural occurring class of plant hormones cytokinins has been found to help increase cotton yields during drought conditions. It has been observed that young cotton seedlings have small root system, making it difficult for them to reach available soil water. Cytokinins assists the young plants in water stress defences, promoting the plant to quickly build a bigger root system to access deep soil mosture. To be effective this phytohormone should be at an early stage of development. Which hormone is synthesized at the shoot - tip of plant body ?