We propose that there are three phases of dormancy in D. rotundata yams: Phase I (tuber initiation to tuber germinating meristem formation), Phase II (tuber germinating meristem to foliar primordium) and Phase III (foliar primordium to the appearance of shoot buds at the surface/sprouting loci).
Which are different phases of dormancy?
Dormancy of trees can be divided arbitrarily into three phases: early rest, winter rest, and after-rest. Each of these phases is marked by a distinct set of physiological processes. The transition between the three phases is gradual.
What is the germination period for yam?
Tuber development begins around 11 to 13 weeks after the yam plant emerges.
What causes spoilage in yam?
The spoilage molds identified were Aspergillus fumigatus, Aspergillus niger, and Rhizopus stolonifer. These isolates were subjected to pathogenicity tests using fresh healthy tubers in order to confirm their ability to elicit same spoilage symptoms in healthy tubers.
What is the life cycle of yam?
Yam growing cycle
Yam is a perennial plant, although it is treated as an annual one. Growth takes place in three distinct phases, which develop over 12 months and repeat indefinitely during the life of the plant. For this reason, it is said that the yam is a perennial grown as an annual.
What is dormancy explain?
Dormancy is a period in an organism’s life cycle when growth, development, and (in animals) physical activity are temporarily stopped. This minimizes metabolic activity and therefore helps an organism to conserve energy. Dormancy tends to be closely associated with environmental conditions.
What do you mean by dormancy?
(1) : being in a state of suspended animation. (2) botany : not actively growing but protected (as by bud scales) from the environment —used of plant parts. 4 : associated with, carried out, or applied during a period of dormancy dormant grafting.
How do you increase the yield of a yam?
Some approaches to producing quality seed of yam are as follows: farmers select small whole tubers from a ware crop harvest; stimulate the production of seed tubers by ‘milking’ ware tubers while the leaves of the plant are still green (double harvest system); cut ware tubers into setts about the same sizes as regular
What are the diseases of yam?
The field and storage diseases are presented, anthracnose is regarded as the most widely spread of all the field diseases, while yam mosaic virus disease is considered to cause the most severe losses in yams. Dry rot is considered as the most devastating of all the storage diseases of yam.
What is the difference between yam seed and seed yam?
Seed yam ready for planting. Tubers produced from seed yam are genetically identical to the mother seed material, while those produced from yam seeds have an identity different from the parent material. In West Africa, farmer-saved seeds are the predominant source of planting material (Nweke et al. 2011).
What can cause a poor harvest of yams?
Aphids spread this virus, so keep them under control. Otherwise, you can lose up to 50 percent of your yam harvest. Another problem is dry rot disease. This disease is caused by a nematode.
What are the control of yam pest?
Yams are thought to be attacked by >12 pest species in the field and in storage, mainly scale insects [Coccoidea] and white grubs [Scarabaeidae] ; monocrotophos and Sevidol [carbaryl + lindane] are suggested for chemical control of these pests, resp.
Why is yam a tuber?
Above: Yam specimen
However, they all are widely cultivated for their nutritious starchy belowground plant structures called “tubers.” Tubers function as storage organs for the plants, providing energy for regrowth (the “eyes” or sprouting buds of your potatoes when they sit in your kitchen for too long).
Why are they called yams?
African slaves had already been calling the ‘soft’ sweet potatoes ‘yams’ because they resembled the yams in Africa. Thus, ‘soft’ sweet potatoes were referred to as ‘yams’ to distinguish them from the ‘firm’ varieties.
What is the common name of yam?
Pictures
| Title | Caption |
|---|---|
| Leaves | Dioscorea alata (winged yam, uhi); leaves. Maui Nui Botanical Garden, Maui. November 06, 2006 |
| Flowers | Dioscorea alata (winged yam, uhi); flowers. Maui Nui Botanical Garden, Maui. November 06, 2006 |
| Yamlet | Dioscorea alata (winged yam, uhi); yamlet. Maui Nui Botanical Garden, Maui. November 06, 2006 |
How do you cure yams before planting?
- Before planting, treat seed tubers (mini-sets or small tubers) with a mixed solution of insecticide, fungicide and nematicide prepared as follows:
- Dip seed tubers into this solution for 2 to 3 minutes, and then leave them in a shaded place (e.g. under a tree) for 18 to 24 hours to allow the cut surface to dry.
What is another word for dormancy?
What is another word for dormancy?
| inaction | inactivity |
|---|---|
| inertness | quiescence |
| idleness | nonaction |
| abeyancy | calm |
| expectancy | inertia |
What causes plant dormancy?
For plants, dormancy declares when to prepare their soft tissues for freezing temperatures, dry weather, or water and nutrient shortage. Instead of exerting energy in an attempt to grow, they know to stop growing and conserve energy until mild weather returns.
What are the two types of dormancy in plants?
There are two different categories of seed dormancy: exogenous and endogenous (Scarification). Exogenous dormancy is caused by conditions outside of the seed’s embryo. An example of exogenous dormancy is when the seed coat is too durable for moisture to infiltrate, effectively preventing germination.
What is the dormancy one sentence?
How to use Dormancy in a sentence. As the tree or shrub prepares itself for dormancy, its energy is focused on the roots. Fall is the time of year when grasses and other plants prepare for winter dormancy. During dormancy European and Mediterranean plants are given a modicum of water if the weather is very hot.
Which fertilizer is best for yam?
Yams respond well to Organic Fertilizers like compost – a mixture of decayed organic matter composed of plant parts and animal manures.
Gerardo Gonzalez loves cooking. He became interested in it at a young age, and has been honing his skills ever since. He enjoys experimenting with new recipes, and is always looking for ways to improve his technique.
Gerardo’s friends and family are the lucky beneficiaries of his delicious cooking. They always enjoy trying out his latest creations, and often give him feedback on how he can make them even better. Gerardo takes their input to heart, and uses it to continue refining his culinary skills.