Ethylene and Abscissic acid

Question 1

ethylene production increases during leaf –, flower senescence and fruit ripening

Answer 1

abscission

Question 2

ethylene can be induced by wounding or –

Answer 2

stresses

Question 3

fruit ripening includes softening of cell walls, hydrolysis of starch, sugar –, and disappearance of organic acids

Answer 3

accumulation

Question 4

fruits that ripen in response to ethylene exhibit a rise in respiration before ripening called

Answer 4

climacteric

Question 5

bananas, avocados, tomatos

Answer 5

climacteric

Question 6

citrus and grapes

Answer 6

nonclimacteric

Question 7

treating climacteric fruits with ethylene induces fruit to produce additional ethylene

Answer 7

autocatalytic

Question 8

low O2, – temp, and vacuum slow fruit ripening

Answer 8

low

Question 9

ethylene induces – flooding response in which leaves curve downward (upper side of petiole grow faster)

Answer 9

epinasty

Question 10

ethylene changes directionality of plant cell expansion by causing the – in cell wall to change orientation

Answer 10

cellulose microfibrils

Question 11

hormone associated with dormancy and stress

Answer 11

ABA

Question 12

ABA is – in vascular plants

Answer 12

ubiquitous

Question 13

ABA is a – carbon compound with one ring

Answer 13

15

Question 14

ABA is transported in the xylem and phloem but much more abundant in –

Answer 14

phloem sap

Question 15

ABA content of seeds is – in early embryogenesis

Answer 15

low

Question 16

ABA inhibits precocious germiantion and – (spreading of seeds on plant)

Answer 16

vivipary