Category Archives: Plant physiology

What is evapotranspiration? Evapotranspiration (ET) is an important component of the water cycle and is composed of two-subprocesses: evaporation from soil and vegetation surfaces and transpiration that consists of the exchange of moisture between the plant and atmosphere through plant stomata. The term evapotranspiration was first defined by Thornthwaite in 1944 MCQ Quiz 1. WhIch of the Following are the agents involved in the evapotranspiration? a. Leaves of plants b. Soil c. Ocean d. Both leaves of plants and soil 2. The term evapotranspiration was first coined by a. Watson in 1924 b. Thronthwaite in 1944 c. Senna in 1944 […]

Introduction The plant growth regulators are very useful if used properly. They are the substances which can modify the growth of the plants. Plant growth regulators are natural and artificial. Also read our other articles in AGRICULTURE – AT A GLANCE Series Disorders of fruits and vegetables with causes at a glance Plant growth regulators and their function The list of plant growth regulators along with their functions is given below Chemicals / plant growth regulators               Functions     2,4-D (2,4 Di chlorophenoxy Acetic Acid) it acts in Fruit setting if used in […]

Introduction Plant nutrients are a very important part of study of plant physiology. The roles and classification of plant nutrients is very important Plants contain about 80 to 90 percent of water by weight and the remaining 10 to 20 percent is the dry weight The dry matter consists of a number of organic compounds such as carbohydrates, proteins, lipids and others Also read other articles in plant physiology Transpiration   Nearly 90 percent of the dry weight of the plant consists of carbon, hydrogen and oxygen All the mineral elements together contribute only about 6 percent of the dry […]

What is Transpiration?   The loss of water from aerial parts of plants in the form of vapor is known as transpiration. The ideal condition for the evaporatuon of water from internal leaf surface is provided by loose arrangement of the living thin walled mesophyll cells resulting in an abundance of inter cellular space. Part of the epidermal surface of the leaf is made up of a great number of microscopic pores called stomata. Water vapor collected in thei intercellular spaces of leaf mesophyll diffuse into the atmosphere through the open stomata. This form is termed as stomatal one In […]

Importance of topic ‘photosynthesis’ from the point of view of exam – Photosynthesis is a very important topic in any agri- exam. at least two to three questions may be expected from this topic. Questions may be asked on varius parts of the topic such as c4 plants, CAM plants, wavelenght of light, structures of chloroplasts, Light reaction, Dark reaction etc. This topic cannot be ignored while preparing for exam. Photosynthesis Photosynthesis is a vital physiological process where in the chloroplast of green plants synthesizes sugars by using water and carbon dioxide in the presence of light. Photosynthesis literally means […]