The soil which is soaked with water is called water logged soil and this issue is called water logging. Causes of water Logging Pakistan has one of the best canal system. It is made out of 40790 channel miles. Be that as it may, a few imperfections were found. It has made the twin issues of water logging. A portion ...
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Salinity
The soil in which salt outside is left because of vanishing of water is called saline soil and this issue is called Salinity. A saline soil has electrical conductivity of its immersion equivalent to or more prominent than 4m.mho for each centimeter and its replaceable sodium rate is under 15. Its pH is under 8.5. Saline soil has a lot ...
Read More »Nastic Movement
Nastic Movements A growth or turgor movement of a plant organ in response to an external stimulus, mostly light intensity and temperature, in which the direction of the response is not determined by the direction of the stimulus. The direction of the movement is determined by the structure of the responding organ. The nasties are brought about by growth resembling ...
Read More »Geotropism
Geotropism When plants are placed horizontally they exhibit growth response to the stimulus of one-sided gravity. It is called geotropism or gravitropism. The tip of the stem grows away from the pull of the gravity (negative geotropism) and the root tips grow towards it (positive geotropism). The plant responses to unilateral gravity are growth movements because the resulting curvatures occurs ...
Read More »Pollution
Pollution has been characterized by Odum (1971) as “the undesirable change in the physical, compound or organic qualities of air, land and water that may influence the human life. The poisons cause undesirable physical and natural changes. Man is hunting down sustenance and better living conditions. It has devastated the earth. Man has included a great deal of clean, smoke, ...
Read More »LAMINARIA
Laminaria is found along shores of seas. The majority of the species are lasting. Vegetative structure Plant body The plant body is sporophyte. The sporophyte is separated into three sections: holdfast, stipe and cutting edge. The holdfast is an arrangement of forked root like branches (hapetra). The stipe is constantly unbranched it might be barrel shaped or straightened. Single edge ...
Read More »Plant Movement
Plant Movement It is a characteristics of plants, except for few unicellular plants such as Chlaymydomonas, that they do not exhibit movement of entire organism (locomotion). However, individual plant organs (stems, roots and leaves) exhibit movements. These movements are triggered in response to external environmental stimuli or by an internal timing mechanism, the biological clock. Therefore, these movements are also ...
Read More »Nature of Vernalization Stimulus
Nature of Vernalization Stimulus – Vernalin or Gibberellin Many attempts were made to isolate vernalin but all failed. However, Anton Lang in 1957 showed that application of gibberellins to certain vernalization requiring biennials like henbane induce flowering in them without cold temperature treatment. Purvis in 1961 induced winter annuals to flowers induced by treating their seeds with gibberellins. It was ...
Read More »Vernalization
Vernalization Vernalization is a process that promotes flowering by cold temperature treatment given to a seed that has imbibed water or to a growing a plant. Like photoperiodism, vernalization is also an inductive effect leading to flowering sometime after the cold temperature treatment. If cold temperature treatment is not provided to cold requiring plants they may either show delayed flowering ...
Read More »Anatomy And Physiology Quiz
Extensive Questions Q.1. Describe the role of auxins in various developmental phenomenon in plants? Q.2. Write a note on gibberellins? Q.3. Write a note on application of plant growth hormones in agriculture? Q.4. (I) Classify plant hormones? (II) Discuss the synergetic role of hormones in controlling growth? Q.5. Describe the distribution and functions of gibberellins in plant growth? Q.6. (I) ...
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