Question:
Pinus seed cannot germinate and establish without fungal association This is because
Pinus seed cannot germinate and establish without fungal association This is because
Updated On: Jul 25, 2024
- it has very hard seed coat.
- its seeds contain inhibitors that prevent germination.
- its embryo is immature.
- it has obligate association with mycorrhizae
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The Correct Option is D
Solution and Explanation
Fungus associated with roots of Pinus increases minerals & water absorption for the plant by increasing surface area and in turn fungus gets food from plant. Therefore, mycorrhizal association is obligatory for Pinus seed germination
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Concepts Used:
Gymnosperms
Gymnosperms are flowerless plants that produce cones and seeds. It literally means "naked seed". They sit exposed on the surface of leaf-like structures called bracts. Gymnosperms are vascular plants of the subkingdom Embyophyta and include conifers, cycads, ginkgoes, and gnetophytes. They are abundant in temperate forest and boreal forest biomes with species that can tolerate moist or dry conditions.
Characteristics of Gymnosperms
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- Xylem does not have vessels and the phloem and it has no companion cells and sieve tubes.