Interestingly, with the exception of 9 mM MA, a similar pattern was noted in shoot growth.
Its expression was limited to the shoot meristem region and young emerging leaves, implying that it may play a role in shoot growth or development.
Zn also proved potentially capable of causing phytotoxicity when present at high concentrations in soils, as shown by the decrease in root and shoot growth as well as the changes in chlorophyll a fluorescence and antioxidant system parameters, especially in plants grown in soils supplemented with greater doses of Zn.
In summary, the major effects of decreased water supply on plant function include decreased shoot growth due to decreased leaf biomass and leaf area allocation, and increased leaf N content (area basis).
The families were then ranked for decreased primary shoot growth, shoot dry weight, root dry weight, total plant dry weight and root/shoot ratio after exposure to air pollution treatments.
An increase in shoot length accompanied by a decrease in shoot density is perhaps the most ubiquitous of all growth responses distinguishing flood-tolerant from flood-sensitive species.
Growth analyses revealed that 21 days of Pi deprivation resulted in a 2.3 fold decrease in shoot biomass, however no significant differences could be observed for the root biomass after 21 days of treatment.
Hammond et al. (2003) reported that in A. thaliana the concentration of P in the shoots decreases without causing an effect of plant growth between 24 and 72 h after P withdrawal, suggesting that 24 h of exposure to P withdrawal is a plausible time frame to expect a decrease in shoot P in perennial ryegrass.
The uppermost distal buds differentiate in synchrony with shoot growth [ 25].
Recently, Yu et al. [ 22] reported that B alleviated the chlorosis-symptoms of Al toxicity, and prevented the decrease in Chl concentration and the inhibition of shoot growth after prolonged exposure to Al stress, which was accompanied by a lower Al level in shoots.
Still, a decrease in growth is still growth, right?
