PLANT PHYSIOLOGY
TRANSPORT IN PLANT
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
2, 1, 4, 3, 5
|
|
|
1, 2, 3, 4, 5
|
|
|
2, 4, 3, 1, 5
|
|
|
2, 4, 1, 3, 5
|
Detailed explanation-1: -(I) Water diffuses into the sieve tube elements. (II) Cells of the leaves produce sugar by photosynthesis. (III) Solutes are actively transported into the sieve elements. (IV) Sugar is transported from cell to cell in the leaf.
Detailed explanation-2: -Translocation: Transport from Source to Sink. Photosynthates are produced in the mesophyll cells of photosynthesizing leaves. From there, they are translocated through the phloem where they are used or stored. Mesophyll cells are connected by cytoplasmic channels called plasmodesmata.
Detailed explanation-3: -Phloem transport occurs by the bulk flow of water and dissolved nutrients from photosynthetic source tissues to heterotrophic sink tissues. Bulk flow results from the hydrostatic pressure difference in the phloem between source and sink tissues.
Detailed explanation-4: -Phloem loading refers to the transfer of sugar from mesophyll cells (source) to sieve tube elements, and phloem unloading refers to the transfer of sugar from sieve tube elements to roots or other storage cells.