1.3 Plant life cycle stages Flashcards Preview

RHS Level 2 Module R2101 > 1.3 Plant life cycle stages > Flashcards

Flashcards in 1.3 Plant life cycle stages Deck (7)
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1

Describe the stages of the life cycle of a plant

Seed - dormant stage, no photosynthesis, contains food store for embryo growth.

Juvenile - vegetative growth, rapid growth, long internodes, juvenile leaf shapes.

Adult - flowering and sexually reproductive, produces fruit and seeds, disperses seeds and fruits, vegetative growth slows.

Senescence - (die-back) - growth of plant ceases, flowering ceases, leaves change colour or lose chlorophyll.

Death - cellular/metabolic activity ceases, respiration and photosynthesis do not take place.

2

Horticultural significance/benefits of Seed stage

Collect, store and distribute seed

Plant can travel and disperse - colonise new areas

Plant can remain dormant when conditions aren't right

3

Horticultural significance/benefits of Juvenile stage

Rapid primary growth phase

Good stage to take cuttings

Leafy crops and root vegetables are harvested in juvenile stage

Valuable for foliage - can keep clipped back as hedge to maintain juvenile growth and keep attractive stems

Some develop defences - thorns, prickles, hairs etc.

4

Horticultural significance/benefits of Adult stage

Flower production for displays or cut flowers or on pot plants

Seed or fruit production for a fruit crop

Flower or fruit production for decorative value in a border and to attract insects.

Seed production for plant breeding or propagation

5

Horticultural significance of Senescence stage

Dead tissue needs cutting back/tidying up/composting

Seed (if present) is collected

Stunning colours - autumn leaves - e.g. Acer spp.

Display purpose - dry flowers - e.g. Dipsacus spp. (teasel) and Eryngium spp. (sea holly)

6

Horticultural significance of Death stage

Decomposition of dead plant tissues ensures their elements are recycled back into the ecosystem through the action of decomposers.

This enriches the soil for new plants.

7

Difference between Juvenile and Adult stage in horticulture?

Juvenile stage is non-flowering whereas Adult stage is sexually reproductive, producing flowers and seeds.