The root depends on the shoot for certain vitamins, and variation in the supply, reflecting the metabolic state of the aerial parts, may also influence root growth.
However, water stress and soil type may interact to influence root growth (Howard, 2003).
Conversely, the H1 5 metabolites (Table 2) were found to be associated with the secondary pathway of a stress response deriving from the hydroxyoctadecadienoic acid (HODE), which may influence lateral root growth.
Platypodinae and Coptonotus were excluded because of their uncertain phylogenetic placement and the fact that Platypodinae has generally very long branch lengths which may influence the rooting at the base of Scolytinae [ 13].
Moreover, since both cytokinins and NO may act downstream of auxins to influence root growth, the interaction between cytokinins and NO is important in controlling root development in response to low P, and further work is also needed to understand its mechanisms.
Bacteria containing ACC-deaminase in the vicinity of roots may influence plant growth by modifying root architecture through their potential to regulate ethylene synthesis in plant roots.
The type of litter and tree root traits may influence the patchy distribution of endogeic earthworms, which is known as the "single tree effect" [ 44].
Other factors, such as cytokinins and small peptides, also originate from roots and may influence shoot responses to drying soils [ 6, 10].
A recent genome-wide association study suggests a developmental gene, PAX3, may influence the height of the nasal root (Paternoster et al., 2012).
Specifically, VIT_19s0090g01480 may control Na+ compartmentalization in grapevine roots; and VIT_05s0020g01960 may influence Na+ transfer in stems.
