PGR

The PGRs can be broadly divided into two groups based on their functions in living plant body. One group of PGRs are involved in growth promoting activities, such as cell division, cell enlargement, pattern formation, tropic growth, flowering, fruiting and seed formation These are also called

The PGRs which play an important role in plant responses to wound and stresses of biotic and abiotic origin and also involved in various growth inhibiting activities such as dormancy and abscission, is/are

choose correct pairs of PGRs showing antagonistic effects. (A) ABA and GAs for seed germination (B) ABA and GAs for stomatal closure (C) Auxin and cytokinin for apical dominance

Which one of the PGRs would be used by farmers if they are asked to? (a) Induce parthenocarpy in tomatoes (b) Hastens fruit ripening in tomatoes and apples (c ) Induces howering in mango (d) Elongation and improvement in shape of apple

Read the statements about ethylene given below and select the statements that are correct. a. Ethylene is a simple gaseous PGR. b. Ethylene breaks seed & bud dormancy. c. Ethylene is used to initiate flowering . d. Ethylene promotes root growth & root hair formation .

Match the following for PGR and their chemical nature and select the correct option. {:(,"Column I",,"Column I"),(A.,"IAA",i.,"Carotenoids"),(B.,"Kinetin",ii.,"Terpenes"),(C.,"ABA",iii,"Indole compounds"),(iv,"GA3",iv.,"Adenine derivatives"):}

Identify the correct statements among the following. I. Kurosawa found symptoms of "Bakanae" disease on rice seedlings when they were treated with sterile filtrates of Gibberella fujikuroi. II. The discovery of each of the five major groups of PGR has been accidental. III. Cousins confirmed the release of a volatile substance from ripened oranges that hastened the ripening of stored unripened bananas. IV. F.W Went isolated auxins form coleoptile tips of Avena grass