Flashcards For NEET Biology - Plant Growth and Development

Flashcards for NEET Biology are designed to boost your NEET preparation. Find below flashcards for Plant Growth and Development. These flashcards on Plant Growth and Development are prepared as per the NEET syllabus. This is helpful for aspirants of NEET and other exams during last-minute revision. Flashcards For NEET Biology – Plant Growth and Development, covers all the important points that are frequently asked in the exam. Check BYJU’S for the full set of Flashcards and Study material for NEET Biology. Solve NEET Biology MCQs to check your understanding and outperform in the exam.

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Name of the NEET sub-section
Topic
Flashcards helpful for
Biology
Plant Growth and Development
NEET exams

 

flashcards for neet biology plant growth and development 1
flashcards for neet biology plant growth and development 2
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Plant Growth and Development
Primary growth Apical meristem
Secondary growth Lateral meristem
Meristematic phase Cells are rich in protoplasm, large conspicuous nucleus, thin cellulosic cell wall, abundant plasmodesmatal connections
Elongation phase New cell wall deposition, cell enlargement and increased vacuolation
Maturation phase Maximal cell wall thickening and protoplasmic modifications
Arithmetic growth Linear growth

E.g. root elongation

Geometrical growth Sigmoid curve

E.g. Cell culture, tree showing seasonal activities

Differentiation Cells mature to perform a specific function, e.g. apical meristem and cambium cells differentiate
Dedifferentiation Regaining the capacity to divide after differentiation, e.g. parenchyma cells dedifferentiate to form interfascicular cambium, cork
Redifferentiation Dedifferentiated cells again lose the capacity to divide and mature to perform specific functions, e.g. secondary xylem, phloem, etc.
Plasticity Different kinds of plant structures in different phases of life or environmental conditions, e.g. heterophylly in larkspur and buttercup
Auxin Indole compounds

Natural- IAA, IBA

Synthetic- NAA, 2,4-D

Isolated by F.W. Went from coleoptile of oat seedlings

First isolated from human urine

Produced by growing root and shoot apices

Auxin functions Apical dominance

Root initiation in stem cuttings, xylem differentiation and cell division

Promotes flowering in pineapple, parthenocarpy in tomatoes

Cytokinins Adenine derivatives

Natural- Zeatin

Synthetic- Kinetin

Skoog and Miller identified and crystallised for the first time

Natural source is yeast extract, DNA, coconut milk

Cytokinin functions Promotes lateral and adventitious shoot growth

Delay of leaf senescence

Chloroplast formation

Gibberellins Terpenes

E. Kurosawa identified and discovered gibberellic acid in rice seedlings infected by the fungus Gibberella fujikuroi causing foolish seedling disease

Gibberellin functions Promotes stem elongation in sugarcane, grapes and elongation of fruits like apple

Early seed production in conifers

Bolting or internode elongation in beet, cabbage, etc.

Ethylene Gaseous hormone

Reported by Cousins as a volatile substance in ripened oranges

Ethylene functions Induces fruit ripening, increases respiration rate

Breaks seed and bud dormancy, initiates seed germination in peanuts and sprouting in potato tubers

Promotes senescence and abscission of flowers and leaves

Abscisic acid Carotenoids

Plant growth inhibitor, stress hormone

E.g. inhibitor-B, abscission II and dormin

Antagonist to GAs

Abscisic acid functions Regulates abscission and dormancy

Inhibits seed germination and stimulates stomatal closure

Help plant withstand desiccation and tolerate various stress conditions

Get access to the full set of flashcards for NEET Biology, only at BYJU’S.

Also Check:

NEET Flashcards: Cell Cycle And Cell Division

NEET Flashcards: Transport In Plants

NEET Flashcards: Mineral Nutrition

NEET Flashcards: Photosynthesis In Higher Plants

NEET Flashcards: Respiration In Plants

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