Tag: Differences Between Sieve Tube Elements and Sieve Cells

Structure and Functions of Phloem

Structure and Functions of Phloem: Phloem or bast is a complex, permanent tissue of vascular plants which conducts organic food. Its elements were discovered by Hartig (1837). The term was coined by Nageli (1858). Phloem consists of four types of elements- sieve cells or sieve tube elements, companion or albuminous cells, phloem parenchyma and phloem fibres. …