Plant Growth and Mineral Nutrition — Class 12 Maharashtra HSC Biology revision notes
A 8-page visual revision sheet for Plant Growth and Mineral Nutrition, written for Class 12 Maharashtra HSC Biology. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
Page 1 as PDF
Plant Growth and Mineral Nutrition in one look
an indeterminate climb, five named hormones pulling against each other, and dozens of elements serving the plant's mineral needs
Growth, permanent and irreversible
- growth: permanent, irreversible increase in bulk/form; quantitative: length, size, volume, mass, cell number
- vascular plant growth: indeterminate, lifelong, confined to meristems; leaves/flowers/fruits determinate, fixed size
- unicellular plants show uniform, determinate growth
Three phases of growth
- Cell division: thin-walled, non-vacuolated meristematic cells divide mitotically; growth is slow
- Cell enlargement: the new cell vacuolates, absorbs water, becomes turgid, and enlarges rapidly
- Cell maturation: the cell differentiates and specializes; growth rate slows to a steady state
Measuring growth
- Direct method: a simple measuring scale, for coarse linear growth
- Horizontal microscope: used to measure growth in the field
- Auxanometer: precise linear growth of the shoot; arc type or Pfeffer's type
- Crescograph: J.C. Bose's instrument; magnifies growth up to 10,000 times, recording it per second
Page 1 of 8. The full sheet, all 8 pages, opens free in the app.
What this Plant Growth and Mineral Nutrition sheet covers
- Growth, permanent and irreversible
- Three phases of growth
- Cell division
- Cell enlargement
- Cell maturation
- Measuring growth
- Direct method
- Horizontal microscope
- Auxanometer
- Crescograph
- Growth rate: AGR and RGR
- Arithmetic vs Geometric growth
- Arithmetic growth
- Geometric growth
- Two growth-rate curves, same axes
- The sigmoid growth curve
- Differentiation, de- and re-differentiation
- Development and plasticity
- Growth hormones: the five
- Auxin
- Gibberellin
- Auxin and Gibberellin, at a glance
- Cytokinin
- Ethylene, the only gas
- Abscisic acid, the stress hormone
- Bioassays, matched to hormone
- Promoters
- Inhibitors
- Photoperiodism
- Short Day vs Long Day plants
- Short Day Plants (long night plants)
- Long Day Plants (short night plants)
- Vernalization
- Mineral nutrition, sources
- Macro vs micro elements
- Macroelements
- Microelements (trace)
- Deficiency symptoms, named
- Stunting
- Chlorosis
- Necrosis
- Mottling
- Abscission
- Mobile vs immobile elements
- Passive vs Active mineral absorption
- Passive absorption
- Active absorption
- The nitrogen cycle, four microbial steps
- Nitrogen fixation
- Ammonification
- Nitrification
- Denitrification
- Nitrogen assimilation
- Abbreviations
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Biology chapter by chapter against your real exam dates and free hours, and when the plan reaches Plant Growth and Mineral Nutrition the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.
More Biology Class 12 revision notes
- Biodiversity, Conservation and Environmental Issues
- Biotechnology
- Control and Co-ordination
- Ecosystems and Energy Flow
- Enhancement of Food Production
- Human Health and Diseases
- Inheritance and Variation
- Molecular Basis of Inheritance
- Organisms and Populations
- Origin and Evolution of Life
- Plant Water Relation
- Reproduction in Lower and Higher Animals
- Reproduction in Lower and Higher Plants
- Respiration and Circulation