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Few normal seedlings of tomato were kept in a dark room. After a few days, they were found to have become white-colored like albinos. Which of the following terms will you use to describe them?


  1. Mutated

  2. Embolised

  3. Etiolated

  4. Defoliated


Solution

The correct option is C

Etiolated


Etiolation is the abnormal form of growth observed when plants grow in the darkness or severely reduced light. It is characterized by long, weak stems; smaller leaves due to longer internodes; and a pale yellow color (chlorosis).
Mutation is the permanent alteration of the nucleotide sequence of the genome of an organism.
Water deficit is considered the main limiting factor for the establishment, survival, and growth of plants mainly in water-limited ecosystems. Plants have evolved a wide range of morphological and functional mechanisms to adapt to arid environments. However, if the tension in the xylem conduits becomes too high, thus xylem cavitation can occur i.e., water column breakage. This results in the hydraulic disconnection of leaves and above-ground parts from roots because xylem conduits are filled with air and water vapor, and this phenomenon is called embolism. 
Defoliation is the removal of leaves from plant or tree. 
 

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