1. Cold tolerance: Due to the extremely low temperature in Antarctica, the selected vegetables should have cold tolerance and can grow and reproduce at a lower temperature.

2. Shade tolerance: The light in the Antarctic environment is weak, so the selected vegetables should have good shade tolerance and can grow in weak light.

3. Water saving: Antarctic water resources are very limited, so the vegetables you choose should save water and adapt to the dry environment.

4. Adaptability: The selected vegetables should adapt to the Antarctic environment, adapt to the extreme environment of Antarctica and grow and reproduce.

5. High nutritional value: Because the Antarctic soil is barren, the selected vegetables should have high nutritional value to meet the human demand for vegetable nutrition.

6. Less pests and diseases: Due to the special environment in Antarctica, the selected vegetables should have the characteristics of less pests and diseases to reduce the negative impact on the environment.

To sum up, in order to reduce energy consumption, vegetables grown in Antarctic greenhouse should have the growth characteristics of cold tolerance, shade tolerance, water saving, strong adaptability, high nutritional value and few pests and diseases.