Question

in a sealed the plant where stunted leaves yellow and the shield was not satisfactory what will be the suggestion and why

Answer 1

germinated my rice plants in hydroponic solution and left them in growth chamber with temp: 30 at day and 25 at night with 12 h light and 12 h dark and 75% humidity. At the stage of two seed leaves (10 days old) seedling were transferred into a hydroponic nutrient solution (water was exchanged twice in those 10 days). At the time of transferring plants into hydroponic solution culture, plants seemed to be yellow in color. I thought it was due to nutrient deficiency and when I will give them nutrient solution they will turn green, but I observed that they didn't change their color even after 5 days. but at 7th day after transferring, they started to change the color into green, but the speed of changing the color is too slow. 

I want to know first of all why my plants become yellow immediate after germination and why they have slow rate of turning from yellow to green. I am also adding photos of my plants growing in nutrient solution and water both, you can also observe well in those photos.

Hope you can understand my problem and guide me well, in case of some queries ask me any thing...

Answer 2

While some symptoms of plant disease are challenging to spot, chlorosis makes itself known to even the most novice of gardeners. Chlorosis refers to normally green plant tissue that is pale, bleached, or yellow. Oftentimes, chlorosis only affects the tissue between plant veins (also known as interveinal chlorosis)–resulting in green veins and pale-colored leaf material elsewhere. Plants suffering from severe chlorosis exhibit stunted growth and dead shoots.

This yellowing occurs when chlorophyll fails to develop–which is responsible for plants’ green color and is necessary for the plant to produce the food it needs to grow. Chlorosis is not just an aesthetic issue. It’s indicative of a struggle for vital growth functions.