Nutrient uptake depression index
noun phrasePronunciation: /ˈnjuːtriənt ˈʌpteɪk dɪˈpreʃən ˈɪndɛks/
A quantitative measure of the relative reduction in mineral nutrient absorption by roots under abiotic stress conditions compared to unstressed controls. This index integrates effects on transporter activity, root growth, and nutrient mobility in stressed plants.
Plain English
A number that shows how much plants reduce their nutrient absorption from soil when stressed.
Etymology & History
Usage
"The nutrient uptake depression index showed that salinity stress disproportionately reduced nitrogen and phosphorus absorption."
Style guide notes: Express as percentage reduction or ratio; always specify stress type, duration, and control conditions when reporting values.
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Frequently Asked Questions
What nutrients are typically most affected?
Nitrogen, phosphorus, and potassium uptake often show largest depression under multiple stress types.
How does this index help in breeding?
It identifies genotypes maintaining nutrient acquisition efficiency under stress, valuable for crop improvement programs.
Why Test Candidates on This?
Useful for assessing multi-stress impacts on crop productivity and identifying mechanisms limiting nutrient acquisition under combined stresses.
Required skill level: Mid