Question

Which of the following tissue types is/are established during embryogenesis in wild-type {Arabidopsis thaliana?}

• A. ( Shoot apical meristem )
• B. ( Rosette leaf primordium )
• C. ( Procambium )
• D. ( Lateral root primordium )

Hint:

Understanding the stages of embryogenesis in plants like {Arabidopsis} is fundamental in developmental biology and plant genetics, as these stages lay the groundwork for all future plant structures and functions.

Answer 1

The Correct Option is A

During the embryogenesis of {Arabidopsis thaliana}, specific tissue types are initiated which will later develop into more complex structures as the plant matures. Detailed Analysis of Each Option: 
(A) Shoot apical meristem: Correct. The shoot apical meristem (SAM) is established during the early stages of embryogenesis. It is crucial for the subsequent development of aerial parts of the plant, including leaves and stems. 
(B) Rosette leaf primordium: Incorrect. While the foundation for future leaf development is laid during embryogenesis, specific leaf primordia like the rosette leaves are not formed until post-embryonic development. 
(C) Procambium: Correct. The procambium is formed during embryogenesis and serves as the precursor to the primary vascular tissues, namely xylem and phloem. 
(D) Lateral root primordium: Incorrect. The establishment of lateral root primordia occurs during post-embryonic development and not during the embryonic stages. Conclusion:
Explanation: The shoot apical meristem and procambium are critical for setting up the basic body plan of the plant, including the arrangement of stem cells that will give rise to all future growth and the vascular system that will transport nutrients and water throughout the plant.