Name the bacteria responsible for conversion of nitrite to nitrate.
Nitrobacter bacteria responsible for conversion of nitrite to nitrate.
Maharashtra State Board
What is denitrification?
Denitrification is the microbial breakdown of nitrate compounds into nitrite and Nitrogen gas. This process is facilitated by denitrifying bacteria such as Thiobacillus, Pseudomonas, Spirillum, found in the soil. These microbes play a crucial role in the natural nitrogen cycle by converting nitrates into gaseous forms, promoting nutrient recycling.
Which is the plant stress hormone?
Abscisic acid functions as the stress hormone within plants.
What does it mean by ‘open growth’?
Plants exhibit indeterminate growth, occurring continuously throughout their lifespan in specific regions where meristems are present.
Give the full form of IAA.
Indole-3-acetic acid
Enlist the phases of growth in plants.
The three stages of growth: 1.Cell division 2.cell enlargement 3.cell maturation constitute
Write on macro and micro nutrients required for plant growth.
Macronutrients: Essential macronutrients, such as nitrogen, phosphorus, and potassium, play vital roles in plant development. Nitrogen is crucial for protein synthesis, and its deficiency leads to leaf yellowing and grain wrinkling. Phosphorus, a key component of cell membranes and proteins, causes red spots on leaves and delays seed germination when deficient. Potassium, abundant in growing … Read more
Explain the active absorption of minerals.
1. Plants utilize their root system to absorb minerals from the soil. 2. Charged particles, including positively charged cations and negatively charged anions, are taken up by the roots from the soil. 3. Active absorption, a process demanding metabolic energy, enables minerals to be absorbed against the concentration gradient. 4. ATP energy produced through root … Read more
What is hydroponics? How is it useful in identifying the role of nutrients?
Definition: Hydroponics involves growing plants in nutrient-rich water, either with or without the use of a mechanical support system like sand, gravel, or perlite. 1. Hydroponics, derived from the Greek words “hudor” (water) and “ponos” (work), is a technique where plants are cultivated without soil, receiving essential nutrients through a water-based medium. This involves creating … Read more
Write on the mechanism of opening and closing of stoma
1. Stomatal transpiration is regulated by the turgidity of guard cells. 2. Turgor pressure, acting on the unevenly thickened guard cell wall, governs stomatal movement. 3. The elastic outer wall stretches, pulling the inner inelastic wall, causing stomatal opening. 4. Flaccidity of guard cells results in stomatal closure. 5.Osmotically active sugar increases guard cell osmotic … Read more