Question

Justify the artificial use of phytohormones for plant growth?

Answer 1

Explanation:

Synthetic plant hormones are used to control plant growth. For example, rooting powder contains growth hormones that make stem cuttings develop roots quickly.

Answer 2

MARK THE ANSWER AS THE BRAINLIEST



Phytohormones are specialized chemical messengers which play significant role in plant defense mechanisms against several abiotic stresses. Plants frequently face biotic or abiotic stresses which restrict their growth and productivity. Salinity, abiotic stress, acquires great significance, affecting plants in various ways, including oxidative burst, ions toxicity, altered metabolism and water stress. This ultimately obstructs the plant to reach its actual genetic potential. Recent investigations have unraveled the functional role of potential phytohormones as mediators between abiotic stress signaling and defense responses. These plant hormones have the capacity to induce numerous defense mechanisms by integrating the stress signals. Subsequently, the downstream responses are regulated in a coordinated manner to produce a robust defense response against salt stress. The present chapter highlights the role of hormones such as abscissic acid, gibberellic acid, cytokinins, brassinosteroids, jasmonates and salicylic acid for improving plant’s tolerance and productivity under saline conditions.