Wood had discovered that male Ips beetles secrete a chemical into phloem that attracts potential mates. (discovermagazine.com)
Like the vascular system in people, the xylem and phloem tissues extend throughout the plant. (scientificamerican.com)
Should C starvation come into play, other effects have been presumed to follow, such as decreased phloem transport due to loss of hydraulic conductivity (McDowell et al. 2011) and nutrient deficiency, although the empirical evidence is lacking. (academic.oup.com)