I grow rice plants in laboratory condition with "cool white" bulb as light source. It shows etiolation symptoms in almost all plants, the stems become longer than the normal one. Does the etiolated plant have different content (concentration of nutrition) with the normal one, espesially on the stem part?
The humidity is approx 70-80%.
I grow rice plant at field first. At 30 days after planting, I transplanted the rice plant into pot and placed in laboratory. The symptom was observed at 5-7 days after transplanting.
Is there any reference that explain about the nutrition content of etiolated plant?
Thank you Kumar.
In this case, I want to know about the nutrients content. Is there any correlation between etiolation of the stem and its nutrients content? For example, etiolated stem contain less protein than normal one because the photosynthesis is disturbed? Is there any reference on this?
Etiolated plants usually have distinct characteristics such as elongated stems, poor leaf development,plumular hook, as well as the lack of chlorophyll pigments, which means they are unable to perform photosynthesis All these are due the fact that , in the absence of .light the phytochrome is in the Pr form which is responsible as photoreceptor for light in photomorphogenesis. We usually do this sort of simple experiments for the first year students in Horticulture to show them the importance of light signal.I am not aware of any work of the nutrient content of etiolated plants, except of course,in very close spacing plants, where shading cause competition for various growth factors including light.,and this will certainly affect nutrient content.
Ethiolated plants exhibit higher levels of auxin in the stem that makes the stem supple and weaker to support the plant.
For sure etiolated plants have different nutrient content relative to normal ones. Reduced metabolism, closed stomata, inhibited photosynthesis, phloem transport, active form of phytochrome .......etc. All affect mineral content, organic molecules and hormonal biosynthesis and distribution As for reference, it is so easy to search for that with different key words. Good luck
I do not really understand the physiological rational behind the determination of nutrient content in etiolated plants.
It depends on your experiment design and goals. For example, you want to compare plasma membrane proton pump activity in lighted and etiolated plants. Also, comparing phloem translocation under the above conditions, and other many more physiological processes.
I do not have an experience with rice but etiolation is related to light. You should check your ligth intensy. Then photosynthesis will be normal levels.
Expected to have low nitrogen, magnesium as most of the etiolated tissue contain low rubisco protein and chlorophyll because large amount of leaf N invested in these compounds. thus it is expected to have low levels of these nutrients.
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