Tag: transport in plants

Plants absorb their mineral salt supply from the soil through the roots from the zones of elongation and root hair. The minerals are absorbed as ions which are accumulated by the plants against their concentration in the soil.

Solar heat causes the evaporation of water from the surface of the leaves in form of water vapour through small openings called stomata. This loss is known as transpiration. Due to the loss of water, water stress condition is created that forces the upward movement of water from the soil towards the shoot system. This water is then again distributed to various plant parts.

The absorption, distribution and metabolism of various mineral elements by plants are called mineral nutrition. The mineral elements play important role in the performance and maintenance of life activities. All microelements are absorbed by plants in traces and derived from the parent rock by the process of weathering. 

A nutrient which is required in small quantities is called as a micronutrient. The micronutrients are boron, chlorine, copper, iron, manganese, molybdenum and zinc. These plant food elements are used in very small amounts, but they are just as important to plant development and profitable crop production as the major nutrients. Especially, they work "behind the scene" as activators of many plant functions.

Ammonium sulfate is a fertilizer as it increases the fertility of soil and plants can use it for their functions.

Whenever active transport is being carried out energy is required and ATP is used up as it is the energy currency of the cell.

The active transport of substances require energy and hence they use up ATP which is the energy currency of the cell.

Trace elements are the ones which are required in. Very less amount and are present in less amounts as compared to other elements of major use.

The root nodule bacterium is microaerobic in the sense that it requires oxygen but the high concentration of oxygen is detrimental to nitrogen-fixing enzyme system. Here leghaemoglobin proves beneficial, it absorbs or binds oxygen so that there is no free oxygen left in the nodule and then carries micro-amounts of oxygen to the nodule bacteroids. Thus the correct answer is option B.

Boron regulates pentose phosphate pathway, increases sugar translocation in plants. Due to deficiency of boron growth of roots stops and the disease ' brown heart' is caused in sugarbeet. Thus option A is the correct answer.