ABSCISIC ACID (ABA):-ABA first identified by P.F Weiring (1965). Bonzi contains 4000 mg a.i./l or 4 mg a.i./ml 10 ppm = 10 mg/l Therefore, we need to add enough of the Bonzi to have 10 mg a.i. A plant growth regulator (PGR) is a natural chemical substance produced by plants, also called a plant hormone, that directs or influences some aspect of a plant’s growth and development. The most common growth regulators used in greenhouse crop production are the plant growth retardants. The importance of plant growth regulators in plant tissue culture is well documented. Plant Growth Regulators (PGR):- PGR are such organic compounds occurring naturally in plants as well as synthetic other than nutrients which in small amounts promotes, inhibit or modify any physiological process are called PGR. Phytohormones or plant growth hormones are classified into plant growth inhibitors and plant growth promoters. This practice is commonly referred to as DROP. Sigma offers a broad range of plant growth regulators specifically tested for plant cell culture. The auxins, plant growth regulators are also called indole acetic acid, IAA. Cholodny-Went theory is concerned with which of the following processes: The hormone responsible for apical dominance is. 1-877-567-3598 USD . You can find other Test: Plant Growth Regulators, Photoperiodism, Vernalisation extra questions, Cytokinins are a group of hormones that promote cell division in plant roots and shoots and the growth of buds. 2.4.5 Carbon Nanotubes as Plant Growth Regulators. Distortion and killing of organs. Regulators synthesised by plants and influencing physiological processes, Hormones regulating growth from seed to adulthood. Malic hydrazide (MH):- prevents premature sprouting of onion and potato trade name sprout spout, 7. 8. per liter. Bioassay for gibberellins is Seed dormancy test green leaf test Avena curvature test Dwarf maize test 7. So, the correct answer is 'Regulators synthesized by plants and influencing physiological processes'. 2,3,5-T/Tri-iodo benzoic acid (TIBA):- Increases flowering in chrysanthemum. Determine the number of ml of Bonzi (paclobutrazol) required per liter for a 10 ppm solution. Other potential benefits of mepiquat can be less susceptibility to boll rot, Mapiquat Chloride, CCC, Chlormequat chloride (cycocel):- Used in ornamental plants for shorter inter nodes and thicker stems. It means the qualitative change in plant body. Plant growth regulators (PGRs) are commonly applied to highly maintained turf. Section 7: Example Growth Regulator Calculations . It may guide the growth or differentiation of cells, organs, or tissues. AUXIN:- Derived from the Greek word “auxein” means- “to grow/increase” F.W.Went (1928) … Foolish seedling disease or Bakanae disease is a disease of rice seedlings, which was caused by a fungal pathogen . Canadian Dollar US Dollars; Login or Sign Up; 0 Which method out of the following renders the seed coat permeable to water so that embryo expansion is not physically retarded? This contains 15 Multiple Choice Questions for NEET Test: Plant Growth Regulators, Photoperiodism, Vernalisation (mcq) to study with solutions a complete question bank. MCQs On ABA and Other Growth Regulators For NEET 2021 Plant growth regulators are simple and small chemicals generated by plants naturally to regulate development and growth. Differentiation of the shoot is controlled by. They are produced by plants and control or regulate germination, growth, metabolism, or other physiological activities. Characteristics. 300+ TOP MCQs on ABA and Other Growth Regulators and Answers NEET Biology is the vey important paper in the medical entrance exam. Learners at any stage of their preparations will be benefited from the class. In response to drought stress, plants synthesize the hormone abscisic acid (ABA), which triggers closing of stomatal pores. June 8, 2020 at 4:26 pm Dear we r conducting. Hence Phytohormones are growth regulators synthesized by plants and influencing physiological processes. Treatment at the liner stage improves early growth control after planting, or it maintains plant size in the liner tray. AMO 1618:- (A quaternary ammonium salt) is used in the cultivation of ornamental plants. Concise/Sumagic 0.5 to 10 ppm spray Conduct trials on a small number of plants, adjusting the rates as needed for desired final plant height and duration of height control. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. A variety of plant growth regulators are used to increase number of axillary buds, induce lateral bud break, promote axillary shoot formation, and delay leaf chlorosis of cut flowers [19] [20]. Plant growth regulators, more aptly named “plant growth retardants,” are commercially available in a variety of brand names, and the most common active … BEGONIA, SeedTo control plant growth. Robinson and P.F.V eiring(1963-64) extracted the inhibitory substance and called ‘dormin’ because it caused dormancy. Anti-gibberellins:- phosphon D, Cycocel (CCC), Maleic hydrazide, paclobutrazol, CYTOKININS/KINETIN/KININ:- Term cytokinin proposed by Letham (1963). In addition to reduced clipping yield, PGRs can improve turf quality and stress tolerance while reducing fertility requirements. The hormones that delay senescence must decrease while the ones that speed up the aging process must increase. c) ethylene. A plant hormone used for inducing morphogenesis in plant tissue culture is. Chemicals produced by plants to regulate plant activities are called (a) Chemicals (b) Chlorophyll (c) Growth regulators (d) Neurons 3. 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