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Question
Which of the following sclereids are the characteristic of intercellular spaces of Nymphaea?
Which of the following sclereids are the characteristic of intercellular spaces of Nymphaea?
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Solution
The correct option is D Astrosclereids
Astrosclereids are sclereids having cell wall drawn out into lobes or arms to form a more or less stellate body. They are found in certain xerophytes. Nymphaea contains large intercellular spaces, which occur in the petiole. These airspaces are surrounded by long columns of parenchyma cells. The columnar cells contain chloroplasts and are presumably photosynthetic. Part of a large astroscleried can be seen cutting across one of the parenchymatous fingers. These sclereids add some mechanical strength to fragile structure. Hence the option is D
Astrosclereids are sclereids having cell wall drawn out into lobes or arms to form a more or less stellate body. They are found in certain xerophytes. Nymphaea contains large intercellular spaces, which occur in the petiole. These airspaces are surrounded by long columns of parenchyma cells. The columnar cells contain chloroplasts and are presumably photosynthetic. Part of a large astroscleried can be seen cutting across one of the parenchymatous fingers. These sclereids add some mechanical strength to fragile structure.
Hence the option is D
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