Question
Which of the following genera is associated with coralloid roots?
Cycas
Taxus
Pinus
Sequoia
Solution
A.
Cycas
Roots in Cycas are of two types- normal and coralloid roots. Coralloid roots are irregular, negatively geotropic, dichotomously branched coral like roots which do not possess root hairs and root caps. Coralloid roots have a symbiotic association with blue-green algae like Nostoc and Anabaena species
