The Effects of Plant Growth Regulator Hormones

Plant growth regulators have effects on increasing yield, improving crop management, and enhancing and preserving product quality when used before planting and after harvest.

Gibberellic Acid (GA3) at different concentrations is used in the production of lettuce and arugula grown hydroponically (soilless culture). During this use, application is made by adding different concentrations of Gibberellic Acid (GA3) into mineral nutrient solutions.

These different concentrations of 0, 10^–⁸, and 10^–⁶ M are applied to lettuce and arugula plants grown in a greenhouse. After harvest, they were stored fresh-cut at 21 °C and 4 °C.

Gibberellic Acid (GA3) plays an important role in protein synthesis in plants. By adjusting the pH to a level of 6 during the application phase, it positively affects shoot development by increasing chlorophyll synthesis.

The Properties Examined Are as Follows;

• Weight Loss in Vegetables
• Total Dissolved Solids Content
• Leaf Color Characteristic
• Ascorbic Acid Content
• Nitrate Content
• Overall Quality

The addition of 10-⁶ M Gibberellic Acid (GA3) to mineral solutions significantly affected the yield of processed leaves of leaf lettuce and arugula plants. It was determined that the application of Gibberellic Acid (GA3) before harvest extended the shelf life by delaying the senescence of lettuce and arugula leaves.

Due to the extension of the senescence period in lettuce and arugula, they can be stored freshly in cold storage for up to 21 days.

Gibberellic Acid What Are the Areas of Effect for Gibberellic Acid?

The parts of the plant affected by hormones like Gibberellic Acid are as follows. The effects of exogenous applications are;

• Flowering and Flower Morphology
• Vegetative Growth
• Ion Transport
• Osmoregulation
• Leaf Area Expansion
• Internode Elongation (Side branches, Leaves, etc.)

It has affected many such physiological activities. At the same time, Gibberellic Acid has the activity to increase fruit weight and dry matter content in terms of biomass production. In addition, its post-harvest effects include controlling and slowing down senescence in fruits, vegetables, and leaves.

Use of Gibberellic Acid as a Plant Growth Regulator:

It plays an important role in plant height elongation, fruit size, flowering and fruit set, seed germination, and rooting. It increases plant growth and yield. It enhances fruit size and quality. It increases resistance to diseases.

Note: O Kimya does not approve the use of plant growth regulator products that will affect hormonal changes.