SEED DEVELOPMENT AND GERMINATION

The life of an individual plant begins when an egg nucleus in maternal organ of a flower is fertilized by a sperm nucleus to form a zygote. Growth and differentiation of the zygote produces an Embryo, contained in a protective structure called Seed. When the seed gets appropriate conditions, the embryo within the seed will renew its growth and  will continue to develop into a mature plant. SEED DEVELOPMENT Seed is a mature embryo surrounded...

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DOUBLE FERTILIZATION

Structure of the flower Flowers vary enormously in their structures,yet all flowers follow the same basic plan . A generic flower consists of 4 whorls or circles. The two outermost- the Sepals and the Petals , are vegetative structures. The two innermost- the Stamens and the Pistil ,are the male and female reproductive structures. At the base of pistil or female structure is the ovary ,which contains one or more ovules. DOUBLE FERTILIZATION STAGE...

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TRANSPIRATION

TRANSPIRATION  Plant absorbs a large quantity of water from soil,and it is translocated through the plant and eventually lost to the surrounding atmosphere. The process by which water is lost from the plant into the surrounding atmosphere in the form of water vapor,is called TRANSPIRATION. All of the water absorbed by the plants,less than 5% actually retained for growth and even less is used biochemically. Although a small amount of water...

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PLANT SECONDARY METABOLITES

METABOLITES  They are intermediates or products of metabolisms. Plant produces 2 types of metabolites. Primary metabolites Secondary metabolites PRIMARY METABOLITES A primary  metabolite is a kind of metabolite that is  directly involved in plant growth, development and reproduction.Ex- photosynthesis,respiration,solute transport,translocation,protein synthesis,nutrients assimilation,differentiation,formation of carbohydrates...

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VERNALISATION

Plants have evolve the ability to alter their developmental programme in response to environmental stimuli.  A major switch in the development programme is the transition to flowering. Photoperiod and temperature play an important role in determining the  correct time to flower. Vernalisation is also called  as Chilling treatment/ Cold treatment. Many flowers don't come to flower before they experience a low temperature.  These...

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