GENERAL HISTOLOGY

ENDOCRINE SYSTEM

ENDOCRINE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The ripening of fruit and the dropping of leaves and fruit are principally controlled by ____
A
auxins.
B
indole acetic acid.
C
cytokinins.
D
ethylene.
Explanation: 

Detailed explanation-1: -This increase in ethylene concentration triggers an increase in the fruit’s metabolism and causes the changes to the fruit that occur during ripening. Ripening of climacteric fruits can, therefore, be slowed down by reducing the amount of ethylene the fruits make or by blocking ethylene’s actions [5].

Detailed explanation-2: -Ethylene. The hormone ethylene has two functions. It (1) helps ripen fruit and (2) is involved in the process of abscission, the dropping of leaves, fruits, and flowers.

Detailed explanation-3: -Ethylene is permitted for artificial ripening provided if the concentration does not exceed 100 ppm (parts per million). Ethylene plays a vital role in the natural ripening of fruits. It is a hormone produced naturally within the fruits to stimulate ripening process.

Detailed explanation-4: -In climacteric fruit, the plant hormone ethylene is the major cue that controls most aspects of ripening. By contrast, the ripening of nonclimacteric fruit does not strictly depend on ethylene, and the nature of the triggers of ripening in this type of fruit remains yet to be elucidated.

There is 1 question to complete.