Question

Deciduous and extremely freeze hardy true citrus species is

• A. Poncirus
• B. Eremocitrus
• C. Microcitrus
• D. Clymenia

Hint:

Most common citrus fruits (oranges, lemons, etc.) are evergreen and subtropical. Poncirus trifoliata is an exception, valued for its deciduous nature and exceptional cold hardiness, making it important for breeding and as a rootstock in colder citrus-growing regions.

Answer 1

The Correct Option is A

Step 1: The question needs a citrus relative that is both deciduous and extremely freeze hardy.
Step 2: Eremocitrus, Microcitrus and Clymenia are evergreen and only mildly frost tolerant, so they are ruled out.
Step 3: Poncirus trifoliata sheds its leaves seasonally and survives temperatures well below freezing, and is widely used as a cold hardy rootstock.
Step 4: The correct answer is Poncirus.