Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms?
It is because, the immobile elements are first transported to the tip level of the plant and as Sulphur is an immobile element,which is required by young leaves, stem and root tips. So if the deficiency of Sulphur occurs it would lead to reduced growth, extensive root growth, hard and woody stem and chloriosis which is the yellowing of leaves due to lack of chlorophyll takes place.
Rate this question :
We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ If no, why?Biology - Exemplar
What are essential elements for plants? Give the criteria of essentiality? How are minerals classifieds depending upon the amount in which they are needed by the plants?Biology - Exemplar
We find that Rhizobium forms nodules on the roots of leguminous plants. Also Frankia another microbe forms nitrogen fixing nodules on the roots of non-leguminous plant Alnus.
a. Can we artificially induce the property of nitrogen fixation in a plant – leguminous or non-leguminous?
b. What kind of relationship is observed between mycorrihiza and pine trees?
c. Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.
Biology - Exemplar
With the help of examples describe the classification of essential elements based on the function they perform.Biology - Exemplar
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.
a. Does it indicate that the element is actively mobilized or relatively immobile?
b. Name two elements which are highly mobile and two which are relatively immobile.
c. How is the aspect of mobility of elements important to horticulture and agriculture?
Biology - Exemplar
Mycorrhiza is a mutualistic association. How do the organisms involved in this association benefit from each other?Biology - Exemplar
Name the macronutrient which is a component of all organic compounds but is not obtained from soil.Biology - Exemplar