Gene expression profiling: keys for investigating phloem functions.
Phloem is the major route for transport of carbohydrates, amino acids, and other nutrients from source to sink tissues. Hormones, mRNAs, small RNAs and proteins also are transported by the phloem, and potentially play pivotal roles in communication between organs to coordinate plant development and physiology. A comprehensive understanding of the mechanisms involved in phloem transport and signalling is still lacking. Recent transcript profiling in several plant species has provided new insights to phloem-specialized functions. Here, we review conclusions regarding the unique functions of the phloem and discuss putative roles for mRNAs and small RNA species in long-distance signalling.
Le Hir
Rozenn
R
Umeå Plant Science Center--Department of Forest Genetics and Plant Physiology, The Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden.
Beneteau
Julie
J
Bellini
Catherine
C
Vilaine
Françoise
F
Dinant
Sylvie
S
D016923:Cell Death; D016764:Cell Polarity; D002473:Cell Wall / Q000378:metabolism; D003599:Cytoskeleton / Q000378:metabolism; D020869:Gene Expression Profiling; D007210:Indoleacetic Acids / Q000378:metabolism; D052585:Phloem / Q000166:cytology / Q000254:growth & development / Q000378:metabolism*; D012333:RNA, Messenger / Q000378:metabolism*; D018749:RNA, Plant / Q000378:metabolism; D015398:Signal Transduction; D013312:Stress, Physiological; D014157:Transcription Factors / Q000378:metabolism
D007210:Indoleacetic Acids; D012333:RNA, Messenger; D018749:RNA, Plant; D014157:Transcription Factors