Practice 52 free Engineer & Medical Biology - Transport in Plants questions with answers and step-by-step solutions.
Take two plants, keep plant A in very dry conditions and plant B in high humidity. Simultaneously, immerse the roots of both plants in water with a red dye. What would you observe?
The ability of phloem to distribute sugar depends on the companion cell and sieve element working as a complex. Consider the following statements with regard to possible effects of reduction in companion cell plasmodesmata.
(i) Sugar loading into sieve tubes reduces due to collapse in osmotic pressure gradient.
(ii) Water moves from companion cells into the xylem to maintain osmotic balance.
(iii) The sieve tubes collapse structurally due to loss of turgor pressure.
(iv) Reverse loading of sugar in phloem begins immediately due to pressure inversion.
Under the given condition, the correct statements are:
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