Contents I. Introduction 295 II. Evolution of the Plant Vascular System 295 III. Phloem
Development & Differentiation 300 IV. Molecular Mechanisms Underlying Xylem Cell …

Epigenetics is the study of heritable changes in gene expression that occur without a
change in DNA sequence. Epigenetic phenomena have major economic and medical …

Cucumber is an economically important crop as well as a model system for sex
determination studies and plant vascular biology. Here we report the draft genome …

Cell–cell communication is essential for multicellular development and, consequently,
evolution has brought about an array of distinct mechanisms serving this purpose …

MicroRNAs (miRNAs) are a class of small non-coding RNAs with a critical role in
development and environmental responses. Efficient and reliable detection of miRNAs is an …

Sucrose (Suc) plays a central role in plant growth and development. It is a major end product
of photosynthesis and functions as a primary transport sugar and in some cases as a direct …

The presence of microRNA species in plant phloem sap suggests potential signaling roles
by long‐distance regulation of gene expression. Proof for such a role for a phloem‐mobile …

Due to limited availability of arable land and high market demand for off-season vegetables,
cucurbits (plants in the family Cucurbitaceae) are continuously cultivated under unfavorable …

This review deals with aspects of the cellular and molecular biology of the sieve
element/companion cell complex, the functional unit of sieve tubes in angiosperms. It …

Contents Summary 29 I. Introduction 29 II. Phloem as a conduit for macromolecules 30 III.
Classes of phloem transported RNAs and their function 32 IV. Mode of RNA transport 35 V …