Impact of new generation plant growth regulators on fruit crops - A Review

Abstract

Plant Growth Regulators (PGRs) are chemicals that regulate growth, development, and other physiological processes by upregulating or downregulating certain components. PGRs can be either natural or man-made. PGRs affect or regulates one or more physiological processes. Various PGRs have different sites and actions in different plants. PGRs are divided into two groups based on how long they have been utilized in the horticulture industry. Some PGRs have been successfully harnessed and are commonly used by farmers such as gibberellins, abscisic acid, ethylene, auxins, and cytokinins (Rademacher 2015). Apart from these, there are PGRs whose efficacy and efficiency are well estab-lished, but which have yet to be exploited at the grassroots level due to some technological gaps and a lack of proper information on their impact on fruit crops. Jasmonic acid (JA), brassinosteroids (BR), CPPU, salicylic acid (SA), and other compounds are among them (Mani et al. 2021). The structures of these PGRs are mentioned in Figure 1.Brief overview of established knowledge. In most instances, the use of plant growth regulators (PGRs) alters the hormonal balance within treated plants. This can be accomplished through various methods, such as the application of naturally occurring hormones or their synthetic counterparts externally, inhibiting