Plant Growth Regulators, Auxins and HormonesPlant hormones are endogenous cell compounds with a regulatory role in plant growthand fruit ripening. In general, plant growth substances are categorized into five (5) major groups,each of which has aspecific function.
Those groups are: (a)Auxinsand (b) Cytokinins: Auxins and Cytokinins (natural orsynthetic) usually work together and are by far the most important forregulating plant growth and morphogenesis. Auxins are compounds that positivelyinfluence cell enlargement, bud formation and root initiation. They alsopromote the production of other hormones. Cytokinins are a group of chemicalsthat influence cell division and help delay senescence of tissues.
Auxins togetherwith Cytokinins, they control the growth of stems, roots and fruits, and also convertstems into flowers. (c)Gibberellins: Gibberellins are important in seed germination. They also promoteflowering and cellular division.(d)Ethylene: Ethylene formsthrough the breakdown of methionine in plant cells.
Its effectiveness as aplant hormone depends on its rate of production, versus its rate of escapinginto the atmosphere. Ethylene affects cell growth and shape (stem diameter andheight) as well as fruit-ripening.(e)Abscisic acid: Abscisic acid acts as an inhibitor that affects bud growth, and seed. (Plant hormone – Wiki)The appropriate use of Plant growth regulators is widely used in modernhorticulture, because many plant processes can be actively regulated. For example, acceleration or delayof seed germination, induction of flowering and fruiting, acceleration or delay of senescenceprocesses including fruit ripening and defoliation. The achieved benefits rangefrom facilitating crop management to increasing and securing yield and qualityof the production as well as improvingits storage and shelf life.
(Rademacher, 2015) Grapevine Growth Regulators, Auxins andHormonesGrape and wine production isextremely dependent on the fruit ripening process which is under complexhormonal control. An overview of the roles of abscisic acid and ethylene aspromoters of ripening, as well as the role of auxins, cytokinins andgibberellins as inhibitors of ripening are shown in Figure 1. (Fortes, Teixeira, & Agudelo-Romero, 2015)Fig.1 Overview of the main eventsinvolved in the hormonal control of grape development and ripening (Fortes, Teixeira, & Agudelo-Romero, 2015) Considering the data given we can easily understand that any wellinformed grower is able to control his production growth and ripening to suithis needs. Major conclusionsand recommendations For a grower with entrepreneur interests what matters the most is theyield per unit ratio, meaning how much useful crop he can generate with minimalcost.
It is already mentioned that for recreational agricultural purposes thereare various propagation methods. However for any company to achieveprofitability, the revenues have to be higher than the expenses. This can beachieved by selecting the most cost effective growing method, as well as theappropriate variety that is best suited for the climate and the grower’s needs.Those are the first vital steps toward profitability. (David Tilman, Cassman, & Matson, 2002)Grapes grown for any kind of production (especially for fresh fruit) arehigh maintenance plants that require regular pruning and ongoing attention toinsect and diseases……………..