The condition of a sick plant with yellowing leaving due to inadequate formation of chlorophyll, chlorosis is caused by a nutrient deficiency. Cannabis and hemp plants that are infected early will have stunted growth, but may not show visual signs until a few weeks into flowering. Those visual signs of LCV infection include yellow, rolling, brittle leaves.
In botany, chlorosis is a condition in which leaves produce insufficient chlorophyll. As chlorophyll is responsible for the green color of leaves, chlorotic leaves are pale, yellow, or yellow-white. The affected plant has little or no ability to manufacture carbohydrates through photosynthesis and may die unless the cause of its chlorophyll insufficiency is treated and this may lead to a plant disease called rusts, although some chlorotic plants, such as the albino Arabidopsis thaliana mutant ppi2, are viable if supplied with exogenous sucrose.
The word chlorosis is derived from the Greek khloros meaning "greenish-yellow", "pale green", "pale", "pallid", or "fresh".
In viticulture, the most common symptom of poor nutrition in grapevines is the yellowing of grape leaves caused by chlorosis and the subsequent loss of chlorophyll. This is often seen in vineyard soils that are high in limestone such as the Italian wine region of Barolo in the Piedmont, the Spanish wine region of Rioja and the French wine regions of Champagne and Burgundy. In these soils the grapevine often struggles to pull sufficient levels of iron which is a needed component in the production of chlorophyll.
English
Etymology
From international scientific vocabulary, from New Latin; by surface analysis, chlor- + -osis, where chlor- in this instance refers to pale yellow-green colorations and not to chlorine.
Pronunciation
Noun
chlorosis (countable and uncountable, plural chloroses)
- (medicine, countable) An anaemia, due to deficiency of iron, characterized by a yellow-green coloration of the skin.
- Synonyms: green fever, green sickness, chloremia (sometimes loosely
