PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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have nuclei.
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have cytoplasm.
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have mitochondria.
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have empty lumen.
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Detailed explanation-1: -The small pores of sieve cells and the larger ones of sieve elements are traversed by strands of cytoplasm called P-protein. It is not known whether P-protein is active in transport or merely serves as a seal against leakage in case of injury. See also phloem.
Detailed explanation-2: -Unlike xylem, phloem vessels contain cytoplasm, and this goes through the holes in the sieve plates from one cell to the next. Phloem transports sucrose and amino acids up and down the plant.
Detailed explanation-3: -Differences Between Xylem and Phloem Xylem tissues are the tubular-shaped structure, with the absence of cross walls. This tissue resembles the shape of a star. Phloem tissues are tubular-shaped, elongated, structures with the presence of walls with thin sieve tubes. It is located in the centre of the vascular bundle.
Detailed explanation-4: -In the stems of dicotyledonous plants, xylem vessels are found. These matured xylem vessels are dead and do not contain cytoplasm and cell organelles.