Exposure of germinated seedlings to low temperatures to promote flowering. Covered with wartlike protrusions. See Major gene resistance. vertical resistance . Resistance controlled by one or a few major genes, in which varieties with this type of resistance are usually highly resistant to one or several pathogen races or several disease races or insect biotypes of a given species but are susceptible to others. A common endomycorrhizal association produced by phycomycetous fungi of the genus Endogone.
Host range includes many agricultural and horticultural crops.
The ability to grow and develop into an adult. viable. Said of spore or seed that is able to germinate or grow under favorable conditions. To have active, healthy, well-balanced growth. The capacity for natural growth and survival. Young seedlings that are nearly white or slightly yellow as a result of delayed development of chloroplasts.