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Questions and Answers
What is the main component of the Quillaia bark according to the text?
What is the main component of the Quillaia bark according to the text?
Which type of cells in the Quillaia bark contain numerous starch granules and large prisms of calcium oxalate?
Which type of cells in the Quillaia bark contain numerous starch granules and large prisms of calcium oxalate?
What characterizes the fibers in the Quillaia bark?
What characterizes the fibers in the Quillaia bark?
Which part of the Quillaia bark contains no fibers but unlignified elements?
Which part of the Quillaia bark contains no fibers but unlignified elements?
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What is the main content of medullary rays in the Quillaia bark?
What is the main content of medullary rays in the Quillaia bark?
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Which element is abundantly found in the powder form of Quillaia bark according to the text?
Which element is abundantly found in the powder form of Quillaia bark according to the text?
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The Quillaia bark is derived from the outer part of the bark of Quillaia saponaria.
The Quillaia bark is derived from the outer part of the bark of Quillaia saponaria.
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Phloem parenchyma cells in the Quillaia bark do not contain starch granules or calcium oxalate.
Phloem parenchyma cells in the Quillaia bark do not contain starch granules or calcium oxalate.
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The fibers in the Quillaia bark are straight and thin-walled.
The fibers in the Quillaia bark are straight and thin-walled.
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Medullary rays in the Quillaia bark are always 2-3 cells wide.
Medullary rays in the Quillaia bark are always 2-3 cells wide.
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The innermost part of the Quillaia bark contains both lignified and unlignified elements.
The innermost part of the Quillaia bark contains both lignified and unlignified elements.
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The powder form of Quillaia bark does not contain sclereids.
The powder form of Quillaia bark does not contain sclereids.
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Study Notes
Quillaia Bark Origin
- Derived from the dried inner part of the bark of Quillaia saponaria, family Rosaceae.
Microscopical Characters
- Bark consists mainly of secondary phloem, composed of alternating tangential bands of fibers and sieve tissue with parenchyma.
- Fibers are in irregular groups, occasionally isolated, tortuous with thick strongly lignified walls, irregularly enlarged.
- Phloem parenchyma contains numerous starch granules and large prisms of calcium oxalate (styloid).
- Medullary rays are 3-4 up to 6 cells wide, with parenchyma cells alternating with groups of fibers irregularly thickened, and lignified sub-rectangular sclereids.
- Innermost part of the bark consists of unlignified elements and contains no fibers.
- Powder fibers are in irregular groups, occasionally isolated, tortuous with thick strongly lignified walls, irregularly enlarged.
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Description
Test your knowledge on the microscopic characters of Quillaia bark, including the composition of phloem, fibers, and parenchyma. Identify key features such as starch granules and calcium oxalate crystals.
