Grade 12th passBotany

Q :
Movement of auxin is largely

1. Centripetal
2. Basipetal
3. none of these
4. Both B and C

how it is??

Mayank Bhargava

7 Years agoGrade 12th pass

2 Answers

Agrata Singh

7 Years ago

Auxin is a growth promoting phytohormone. It moves mainly from the apical to the basal end (basipetally). This type of unidirectional transport is termed polar transport.

Auxin is the only plant growth hormone known to be transported polarly. Recently it has been recognized that a significant amount of auxin transport also occur acropetally (from basal end to the apical end) in the root.

VkDev

6 Years ago

The correct answer is (d) i.e both (b) and ©

F.went (1928) reported that auxin is transported basipetaly i.e it moves apical to basal end.

However, McCready and Jocobs (1963) working on petiole segment of phaseolus vulgaris observed the acropetal movement of auxin but such type of movement occurs very little and directly dependent on presence of oxygen.

Thus, recent studies have indicated that the polar movement of auxin is an active transport.