The leaves growing in the «toughest,» most exposed places at the top of the crown grow better suited to
withstand water stress than leaves in the lower crown do.
Not exact matches
Published online this week in the Proceedings of the National Academy of Sciences, the study found that the species most resistant to drought are those that are better at
withstanding stress to the
water transport system — composed of internal pipes known as xylem — that carries
water from the roots to the crown.
The study found that the ability to
withstand this
stress was more predictive of survival than other factors such as the overall amount of
water lost through leaves and the depth of roots.
A team including Princeton University researchers has found that tree species that can
withstand stress to the
water - transport system that carries
water from the roots to the crown are less susceptible to drought and massive die - off.
They add that the turbines rotate slowly, in a drag type mode, so the blades «can be made stronger to
withstand the high
stress loads created by the
water flow, unlike propellers and foils which also try to produce a lift effect to improve their performance».