Cambial tissue of Pinus radiata contains ..............

Auxins

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Gibberellins

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Cytokinin

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None of the above

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Solution

The correct option is D Cytokinin
Cytokinins have been extracted from cambial tissues in the stems of Eucalyptus regnans, Nicotiana tabacum and Pinus radiata. Cessation and reactivation of cell division activity in the vascular cambium is controlled by cytokinin availability.

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Find the incorrect match from the following:

(A) Thallophyta - Also called Algae - Spirogyra, Chara

(B) Bryophyta - Amphibians of the plant kingdom - Funaria, Ulothrix

(D) Gymnosperms - Naked seeds - Pinus, Cycas

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