why do shoots exhibit negative geotropism?
Asked by | 9th Sep, 2012, 07:24: PM
Due to the negative geotropism of stems?,? ??????t?????he stems will grow towards the light and up and away from gravity. ?This places the leaves in better light ?c?a?u?s?i?n?g? ?????increase in photosynthesis.?? ???More food means better growth and reproduction.?
Plant shoots show negative geotropism because gravity causes auxins to build up on the bottom which causes the cells on the bottom to elongate. If a shoot is laid horizontally, the auxins redistribute to the lower side resulting in a higher concentration in those cells. In the shoot, the higher concentration causes increased cell growth, so the shoot bends upwards or against gravity, a negative geotropism.
Answered by | 10th Sep, 2012, 09:21: AM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Verify mobile number
Enter the OTP sent to your number