T. Beardmore et al., Interactions of airborne methyl jasmonate with vegetative storage protein gene and protein accumulation and biomass partitioning in Populus plants, CAN J FORES, 30(7), 2000, pp. 1106-1113
Citations number
40
Categorie Soggetti
Plant Sciences
Journal title
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE
In young poplar (Populus nigra Muench x Populus maximowiczii A. Henry) plan
ts, vegetative storage proteins (VSPs), the bark storage protein (BSP), and
(or) wound-inducible 4 protein (WIN4) mRNAs were present in the apical and
basal leaves and in the basal leaves, respectively. VSPs accumulated in th
e apical leaves and to a lesser extent in the stem. The response of the pla
nts to 20 mu M airborne methyl jasmonate (MJ) was examined in four parts (
apical and basal leaves, stem, and roots) in both short-term (within 72 h)
and long-term (1, 2, 3, and 4 weeks) experiments. In the short-term, MJ-tre
ated plants either induced or increased the part-specific expression of win
4 and bsp, and accumulation of BSP and (or) WIN4. In the long-term, MJ trea
tment resulted in part-specific alterations in protein and nitrogen concent
ration and further altered BSP and WIN4 accumulation. The MJ-treated plants
increased both the biomass allocation to the stem, without a change in the
relative growth rate, and the tolerance low temperature (-2degreesC). Toge
ther, these results suggest the BSP and WIN4 are both involved in short-ter
m N cycling and that exogenous MJ treatment promotes changes in nitrogen me
tabolism in poplar.