Plant Growth and Development

Assertion : Gibberellic acid increases length of grape stalks. Reason : Ethophon hastens fruit ripening in tomato and apple.

Which hormone inhibits morphogenesis?

Assertion : In vernalisation, flowering is induced by low temperature. Reason : ABA is growth inhibiting hormone.

Read the given statements and identify the PGRs $X, Y$ and $Z$. $\mathrm{X}$ induces accumulation of salts inside the cells. Y promotes rapid elongation of leaf bases and internodes in deep water rice plants. (iii)…

Which of the following sets does not include all natural plant growth regulators?

Which of the following is not a bioassay for cytokinins?

Which among the following are auxins?

Identify the incorrect statement about $\mathrm{ABA}$ growth regulator?

Assertion : Storage of seeds at low temperature is possible. Reason : Respiration and enzymatic activity of seeds are very high at low temperature.

One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third hormone increases the tolerance of plants to various stresses. They are respectively

Assertion : A correct concentration of auxin and cytokinin is required for the development of root and shoot in a callus. Reason : When the ratio of kinetin to auxin is high, then only shoots develop. But when the ratio…

Assertion : Plant growth regulators (PGRs) are very important for plant growth and development. Reason : Auxins do not induce flowering in gymnosperms.