What is meant by apical dominance?
Apical dominance is defined as an inhibitory control exercised by the apical portions of the shoot over the growth of the lateral buds below. From: Plant Growth and Development: Hormones and Environment, 2002.
How is apical dominance measured?
Probably the most common way of detecting apical dominance release is to measure the outgrowth (i.e., bud length or fresh mass) of lateral shoots following decapi- tation or other restrictive treatments of the shoot apex.
What is apical dominance and what is the solution?
It’s the phenomenon in plants where a main shoot dominates and inhibits the outgrowth of other shoots. In plants with strong apical dominance, main shoot tip damage or shoot tip loss, caused by pruning or herbivory, leads to the outgrowth of compact embryonic shoots (axillary buds) into branches.
How do I break my apical dominance?
Apical dominance can be interrupted by increasing the ratio of cytokinin to auxin with a foliar application of the synthetic cytokinin in Configure. This reduces auxin’s ability to prevent axillary bud break and allows the axillary buds to escape from apical dominance.
What is the reason of apical dominance?
Apical dominance occurs when the shoot apex inhibits the growth of lateral buds so that the plant may grow vertically. It is important for the plant to devote energy to growing upward so that it can get more light to undergo photosynthesis.
What is apical dominance Class 12?
Apical dominance is a phenomenon in which central stem is dominant and growth of lateral buds is inhibited. It is due to plant hormones produced in the tip of the shoot. Auxin hormone is responsible for apical dominance and cytokinin hormone is responsible for breaking the apical dominance.
What hormone is responsible for apical dominance?
Auxins
Auxins are mainly responsible for apical dominance. I A A is a natural auxin.
What hormone overcomes apical dominance?
Presence of cytokinin in an area causes preferential movement of nutrients towards it. When applied to lateral buds, they help in their growth despite the presence of apical bud. They thus act antagonistically to auxin which promotes apical dominance. Therefore cytokinin can overcome apical dominance, caused by auxins.
What hormone promotes apical dominance?
hormone auxin
It is commonly accepted that the plant hormone auxin mediates apical dominance.
Which auxin is responsible for apical dominance?
IAA
Apical dominance is caused by the apical bud producing IAA (auxin) hormone in abundance. This auxin is transported basipetally from the apical bud.
Which hormone has positive effect on apical dominance?
The hormone which has a positive effect on apical dominance is Auxin.