GROWTH SUBSTANCES AND ITS ROLES IN VEGETABLE CROP GROWTH

INTRODUCTION ,[object Object],[object Object]

PLANT GROWTH SUBTSTANCES ,[object Object],[object Object]

ROLE IN PLANT GROWTH AND DEVELOPMENT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why do plants have hormones? ,[object Object]

DISCOVERY OF AUXIN ,[object Object]

Darwin's Experiment with the Seeding of Canary Grass ,[object Object],[object Object]

Possible Involvement of Plant Growth Substances in Apical Dominance in Presence of Apical Bud

Auxins are of 2 types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Auxins Characteristics Features: Polar translocation - Apical dominance - Variable Behaviour or root and shoot growth - Root Initiation - Delay in abscision and differentiation of xylem elements. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Practical Applications of Auxins ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Commercial Applications of Auxins ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Auxins use in Agriculture and Horticulture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Inhibition of Abscission ,[object Object],[object Object]

Development of Seedless Fruits Parthenocarpy ,[object Object]

Weedicides Weedicides Many synthetic auxins are used as selective weed killers and herbicides. 2, 4 - D (2, 4 - dichloro phenoxy acetic acid) is used to destroy broad leaved weeds. It does not affect mature monocotyledonous plants.

Destruction of Weeds by 2,4-D Spray

TRANSPORT OF AUXIN ,[object Object],[object Object],[object Object]

How Hormones Work - Signal Transduction Pathways

General model ,[object Object],[object Object]

Specific example: a hypothetical mechanism for auxin's stimulation of cell elongation.

Specific example: a hypothetical mechanism for auxin's stimulation of cell elongation. ,[object Object]

Polar auxin transport: a chemiosmotic model.

Polar auxin transport: a chemiosmotic model. ,[object Object]

Tropisms: Plant Growth Responses and Movement ,[object Object],[object Object],[object Object]

How does auxin become concentrated along the lower side of a horizontal root?

How does auxin become concentrated along the lower side of a horizontal root? ,[object Object]

GROWTH SUBSTANCES AND ITS ROLES IN VEGETABLE CROP GROWTH

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