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Investigating the effect of different wavelengths of light on germination of Cicer arietinum

Study on the impact of light wavelengths on seed germination.

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    Surname 1 Investigating the effect of different wavelengths of light on germination of Cicer arietinum Name ESS Professor October 4, 2014 "Evaluate the impact of different light wavelengths on the germination of Cicer arietinum . In your answer, discuss the methodology used, the results obtained, and the implications of light quality on seed germination. Consider how the findings of this experiment contribute to the broader understanding of plant development and seedling growth." Word count: 800 - 1000 words

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    Surname 2 INTRODUCTION Chickpea ( Cicer arietinum ) is a dicot and hypo geal plant. The plant propagates through viable seeds which are considered to have germinated after emergi ng from the ground and concentrates most of its energies on the cotyledons thereby making them large. Initially, the seed absorbs water and swells at the optimal temperature o f 28 - 33°C after which the radicle starts emerging followed by the plumule, which moves upwards (Singh and Diwakar 28 ; Brändel 12 ) . During the germination process, the epicotyls, which is a region above the cotyledon, elongates and causes vertical growth on the plumule. This growth produces an upright shoot with leaves, whereas the radicle grows downwards to produce the roots ( Chory et al . 12066). The vertical growth in germination of chickpea seeds happens at a notably first rate. When the chickpea seeds lack sufficient luminous power in the form of light, it responds by developing a weak but long stem (Kvaalen and Maigull 437 ; Khan and Ungar 279 ) . The effects of light in the germination of seeds and growth of seedlings have been extensively researched ( Fankhauser and Chory 203) . The presence of light in the area of germination could influence germination in some seeds whereas its presence may result in inhibition ( Batty 23; Dove 14) . In 2011, Anchalee reported his findings by stating that lights of different wavelengths could result in different effects on various germination parameters of Nepenthes mirabilis . Various types of visible light for example green (510nm), red (660nm), blue (475nm), yellow (570nm) and white (400 - 700nm) can be used to promote seeds germination o n some selecte d seeds (Jones and Jones 56; Khan and Salman 131 ) . Anchalee concluded that although the germination of seeds was influenced by red and white lights, the effect resulting from red light could not be match with any other. Thus, the aim of this experiment was to investigate the effects different wavelengths of visible light on the

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    Surname 3 germinability of Cicer arietinum . Out of this experiment, a light that promotes germination will be identified.

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