What is the role of PGR in fruit crops?
The plant growth regulators are the organic chemical compounds, other than nutrients and vitamins, which modify or regulate physiological processes in an appreciable measure in the plant when used in small concentration. They are known to influence fruit set, retention, yield and quality of fruit crops.
Which plant growth regulator is used for fruit thinning?
NAA (Fruitone-L®) NAA (napthaleneacetic acid) is an auxin plant growth regulator that will effectively promote return bloom when used at the thinning stage in trees that are biennial bearing.
What is an example of a plant growth regulator?
Auxin, cytokinin, gibberellins, abscisic acid are some of the examples of plant growth regulators. They enhance or inhibit the growth of the plants.
What are plant growth regulators 11?
Plant growth regulators are the chemical substances that control the aspects of growth and development within the plants completely. They are also known as plant growth hormones or phytohormones.
Which hormone is used for fruit thinning?
Naphthaleneacetic acid (NAA). It is used at concentrations ranging from 3 to 20 ppm and its thinning effectiveness is linear with concentration.
What is auxin class 11?
Auxin is a class of plant hormones that possess morphogen-like characteristics. -Auxin is known to induce shoot apical dominance. It inhibits the development of the axillary buds by initiation in the process of ethylene synthesis which causes inhibition of their growth.
What is plant regulator?
Definition of plant regulator : a natural or synthetic organic substance (as an auxin or maleic hydrazide) other than a nutrient that acts in very small amounts to modify any physiological process in plants — compare plant hormone.
What is Alar used for?
Daminozide – also known as Alar, Kylar, B-NINE, DMASA, SADH, or B 995 – is a plant growth regulator, a chemical sprayed on fruit to regulate growth, make harvest easier, and keep apples from falling off the trees before they ripen so they are red and firm for storage.
Which is a fruit thinning agent?
A carbamate insecticide (carbaryl) also is used to cause fruit thinning. Combinations of NAA and carbaryl or BA and carbaryl are the most commonly used sprays. A myriad of possible combinations of chemicals, timings, rates, and varieties provide many possible thinning program options for growers.
What is the function of gibberellins?
Gibberellins (GAs) are plant hormones that regulate various developmental processes, including stem elongation, germination, dormancy, flowering, flower development, and leaf and fruit senescence. GAs are one of the longest-known classes of plant hormone.
How are growth regulators used in fruit production?
Use of Growth Regulators in Fruit Production Plant bio-regulators, both natural and synthetic affect growth and development processes in plants. Plant growth regulators refer to organic compounds other than nutrients which in small quantities promote, inhibit or otherwise modify any plant physiological process.
Which is the best description of a growth regulator?
Plant growth regulators are the chemical substances which govern all the factors of development and growth within plants. Some other names used to refer to it are phytohormones and plant growth hormones.
How are growth hormones used to control plants?
Plant growth regulators can be defined as chemicals which signal to regulate and control the growth of plants. They are also referred to as plant growth hormones or phytohormones. Plant growth hormones are organic compounds which are either produced naturally within the plants or are synthesized in laboratories.
What are the different types of plant growth inhibitors?
Plant growth inhibitors. Auxins, Gibberellins, and Cytokinins are grouped into Plant growth promoters while Abscisic acid and Ethylene are grouped into Plant growth inhibitors. Ethylene can be grouped either into the promoters or into the plant inhibitors.