Gibberellin

In grape cultivation in Thailand What hormones are used to help make the grape bunches more airy and reduce fruit bunching for better quality grapes?

• Auxin

• Cytokinin

• Gibberrellin

• Ethylene

At what stage does the seed produce more gibberellins?

• When the seed is fully developed

• after germination

• rest period

• while growing

In what areas does gibberellins influence cell division and cell elongation?

• intercalary meristem

• primary meristem

• apical meristem

• lateral meristem

Gibberellins are transmitted primarily from the top to the lower leaves through which tissue?

• xylem และ phloem

• phloem

• xylem

• xylem and phloem

Which of the following is not a characteristic of plants' response to gibberellins?

• ripening of bananas

• flowering of carrots

• the birth of an apple parthenocarpic

• stimulation of cell division at the intercalary meristem

Which of the following is a response to gibberellins?

• Fruiting of mango

• The ripening of papaya fruit

• Root germination of tea needle branches

• stretching of sugarcane

Which of the following is caused by the effect of the same hormone?

• Falling of mango leaves and stretching of mango leaves

• Elongation of dwarf plants and flowering of cabbage.

• Root germination of needle cutting and corn germination

• Pineapple flowering and grape size enlargement

From the picture, the fungus that grows on the rice plant is a fungus caused by Gibberellin. What is the name of the fungus?

• Colletotrichum sp

• Gibberella fujikuroi

• Oidium sp.

• Pseudoperonospora cubensis

Which tissue produces more gibberellins than the others?

• leaves

  elite

• root

• fruit

• stem top

Where is the gibberellin used as a signal to stimulate aleurone cells to produce digestive enzymes that are stored in the starchy endosperm?

• seed coat

• embryo

• aleurone layer

• endosperm