What is relative water content?
Relative water content is described as the amount of water in a leaf at the time of sampling relative to the maximal water a leaf can hold. It is an important parameter in water relation studies, e.g. it allows the calculation of the osmotic potential at full turgor.
How do you calculate relative water content?
Relative water content may be accurately estimated using the ratio of tissue fresh weight to tissue turgid weight, termed here relative tissue weight. That relative water content and relative tissue weight are linearly related is demonstrated algebraically.
What is the water content in plants?
Leaf relative water content (RWC) is an important indicator of water status in plants; it reflects the balance between water supply to the leaf tissue and transpiration rate (Lugojan and Ciulca 2011).
How do you calculate membrane stability index?
It was calculated as: RWC = [(FM – DM)/(TM – DM)] × 100. Membrane stability index (MSI): Leaf MSI was esti- mated according to Sairam et al. (1997). For MSI estimation, 100 mg of leaf material, in two sets, was taken in test tubes containing 10 ml of double distilled water.
What is turgid weight?
Turgidity is the condition of swelling in a cell when it is placed in a hypotonic solution. Water from the hypotonic external solution enter the cell and increase the turgor pressure of the cell. Turgidity occurs due to the process of osmosis.
How are contents of water categorized?
Group 1: water content less than 50% and non-ionic. Group 2: water content greater than 50% and non-ionic. Group 3: water content less than 50% and ionic. Group 4: water content greater than 50% and ionic.
How do you measure water content in plants?
Of all the different testing methods, oven dry tests are considered the most reliable for establishing the moisture content of nearly any type of plant matter. However, these tests have some drawbacks: They Tend to Be Slow. Oven dry tests using dehydrators or ovens can take hours to complete.
What is ion leakage?
Introduction. Electrolyte leakage is a hallmark of stress response in intact plant cells. This phenomenon is widely used as a test for the stress-induced injury of plant tissues and ‘a measure’ of plant stress tolerance (Levitt, 1972; Blum and Ebercon, 1981; Bajji et al., 2002; Lee and Zhu, 2010).
What is the membrane stability index?
The membrane stability index (MSI) is another physiological index that has been widely used to evaluate drought and heat tolerance (Blum and Ebercon 1980). Desiccation of plant cells causes cell membrane leakage of ions and electrolytes (Bandurska 2001).
What is relative turgidity?
the fact of being swollen or firm, usually because of being full of liquid: Water is essential to maintain the turgidity of cells. The cells lose their turgidity and the pore closes.
What is leaf water potential?
Leaf water potential (LWP) indicates the whole plant water status, and maintenance of high LWP is found to be associated with dehydration avoidance mechanisms. Under relatively mild stress, delayed leaf rolling may be associated with sustained plant growth and production.