Sieve tubes in phloem are tubular cells with perforated walls, allowing for the transport of food materials like sugars from the leaves to other parts of the plant.
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Sieve tubes in phloem are tubular cells with perforated walls, allowing for the transport of food materials like sugars from the leaves to other parts of the plant.
Sieve tubes in the phloem are specialized for long-distance transport of nutrients such as sugars. They are composed of sieve tube elements, which are elongated cells with perforated end walls called sieve plates. These sieve plates allow for the movement of sap containing sugars and other organic compounds between sieve tube elements. Unlike other phloem cells, sieve tube elements lack nuclei and other organelles to maximize their efficiency in nutrient transport.