Glycophytes are salt-sensitive plants while halophytes are salt-tolerant plants. The following statements were made to explain the difference between the glycophytes and halophytes:

A. Glycophytes enhance the uptake of ions.
B. Glycophytes actively pump ions back into the soil.
C. Halophytes have the ability to resist net ion uptake in the shoot.
D. Halophytes have greater capacity for vacuolar sequestration of ions.

Select the option that has the combination of all correct statements.

Correct option is D

Explanation-

Statement A - Glycophytes enhance the uptake of ions - INCORRECT
Glycophytes lack efficient mechanisms to regulate ion uptake. Under salt stress, they often accumulate excess ions passively, leading to toxicity — they don’t "enhance" ion uptake as a strategy.
Statement B - Glycophytes actively pump ions back into the soil  - CORRECT
Some glycophytes try to cope with salt stress by actively pumping out ions (especially Na⁺) to prevent accumulation in cells. However, this mechanism is limited and energetically costly.
Statement C - Halophytes have ability to resist net ion uptake in the shoot - CORRECT
Halophytes maintain low shoot ion concentrations by excluding Na⁺ at the root or sequestering it in root vacuoles. This helps protect the photosynthetic tissues in the shoot.
Statement D - Halophytes have greater capacity for vacuolar sequestration of ions - CORRECT
Halophytes store toxic ions like Na⁺ in vacuoles, keeping cytoplasm safe. This is a major salt tolerance strategy allowing normal metabolism despite high external salt.

Final Answer:
Correct statements: B, C, and D (Option d )