Create your own conference schedule! Click here for full instructions

Abstract Detail



Physiology & Ecophysiology

Umebayashi, Toshihiro [1], Utsumi, Yasuhiro [2], Sano, Yuzou [3].

The interspecific difference in drought stress tolerance with transplants between two woody species.

Transplants of woody plant saplings are generally conducted after root pruning. Water in the saplings ascend under negative pressure, and root pruning may involve significant risks such as the occurrence of xylem embolisms and the fungal invasion. Thus, the understanding of the interspecific difference in drought stress tolerance in root pruning would improve the success rate of transplants of woody plants. In this study, we evaluated the interspecific differences in drought stress tolerance using a centrifuge methodology, and compared the losses of hydraulic conductivity of the stem after transplants between the two woody species (Betula maximowicziana and Larix kaempferi). B. maximowicziana (angiospermous tree) had higher conductivity and was more vulnerable to water stress-induced embolisms than L. kaempferi (conifer). The specific conductivity of the stem in root-pruned saplings significantly differed between the two species. The specific conductivity of the stem in L. kaempferi hardly changed after root pruning irrespective of the extent of the treatment. On the other hand, the conductivity in B. maximowicziana significantly decreased with the treatment of root pruning, and the mortality rate also increased with the amount of pruned roots. Our results suggested that the existence of species-specific vulnerability to water stress-induced embolisms and root pruning. It is desirable to keep roots as much as possible when angiospermous trees having high conductivity are transplanted.


Log in to add this item to your schedule

1 - Hokkaido University, Research Faculty of Agriculture, Kita 9, Nishi 9, Kita-ku, Sapporo, Hokkaido, 0608589, JAPAN
2 - Kyushu University, Tsubakuro 394, Sasaguri, Fukuoka, N/A, 811-2415, Japan
3 - HOKKAIDO UNIVERSITY, LAB OF WOODY PLANT BIO, FAC OF AGRIC, KITA-9, NISH, HOKKAIDO UNIVERSITY, SAPPORO, N/A, 060-8589, Japan

Keywords:
root pruning
transplant
xylem
embolism.

Presentation Type: Poster
Session: P, Physiology & Ecophysiology
Location: Exhibit Hall/Omni Hotel
Date: Monday, June 26th, 2017
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PPE007
Abstract ID:349
Candidate for Awards:None


Copyright © 2000-2017, Botanical Society of America. All rights reserved