- The pericycle of a root, the outermost layer of the stele, can become meristematic and give rise to lateral roots. The stele of a lateral root connects to the stele of the main root, allowing the vascular tissue to be continuous with the main root.

- The meristematic tissue called vascular cambium is found between the xylem and phloem of the vascular bundles of a dicot stem. The vascular cambium is a lateral meristem that allows for secondary growthin the dicot stem by producing secondary xylem and phloem.

- In the young part of the stem, secondary growth has not occurred. The stem consists of a central pith, xylem tissue, vascular cambium, phloem, and epidermis. - During secondary growth of the stem, the vascular cambium forms new xylem and phloem. Also, vascular rays develop that function in the radial transport of water. Cork cambium eventually arises from parenchyma cellsin the cortex of the stem. The cork cambium produces cork, which serves as a protective covering that replaces lost epidermis. The cork cambium and cork are collectively referred to as periderm. - The rings in trees reflect the seasonal growth of secondary vascular xylem. During the winter, the vascular cambium becomes dormant. As growth resumes in the spring, the vessel elements and tracheids of the xylem are relatively large, for the transport of large amounts of water. As spring progresses into summer, the vessel elements and tracheids become smaller as seen in the light micrograph to the left.

The two lateral meristems responsible for secondary growth are

- vascular cambium and cork cambium.

Which statement regarding xylem growth is correct?

- The vascular cambium produces xylem toward the inside of the stem.

13.1.5 Secondary Growth: Lateral Meristems and Secondary Vascular Tissue Flashcards by Irina Soloshenko

This is a private class.

You need a Pro account to access a Private class
I have an access code

To request access, contact Irina Soloshenko, and ask that they share the class directly with you, using the email address you use for your Brainscape account.

Brainscape's Knowledge GenomeTM

13.1.5 Secondary Growth: Lateral Meristems and Secondary Vascular Tissue Flashcards

Brainscape's Knowledge Genome^TM