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The water relation of seedlings of Picea jezoensis on fallen logs

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Title: The water relation of seedlings of Picea jezoensis on fallen logs
Authors: Iijima, Hayato Browse this author
Shibuya, Masato Browse this author →KAKEN DB
Saito, Hideyuki Browse this author
Takahashi, Kunihide Browse this author
Keywords: sitchensis bong carr
Northern Japan
chlorophyll fluoresecence
coniferous forest
tree seedling
Issue Date: Mar-2006
Journal Title: Canadian journal of forest research
Volume: 36
Issue: 3
Start Page: 664
End Page: 670
Publisher DOI: 10.1139/X05.285
Abstract: We examined whether fallen logs without moss (FLB) are more drought-stressful sites for Picea jezoensis Carr. seedlings than are logs with moss (FLM) and whether drought affects the mortality of seedlings on logs. We measured the water potential of the log humus layer (Psi(H)) and needles of seedlings on the logs (Psi(N)) in a natural forest and a greenhouse under various drought conditions. We also determined the critical Psi(N) from the relationship between seedling mortality, Psi(N), and chlorophyll fluorescence, Fv/Fm. The Psi(H) on both moss-covered and bare logs in the forest was 0 MPa, regardless of the number of days without precipitation. In the forest, the mean predawn Psi(N) of FLB and FLM measured 11 days after a rainfall was -0.8 and -0.7 MPa, respectively, in the driest season. The Psi(N) for P. jezoensis seedlings of FLB reached the critical value earlier than those of FLM in the greenhouse, but this occurred after a long period (> 30 days) with no irrigation. We conclude that drought does not cause mortality of P. jezoensis seedlings on fallen logs in natural forests
Rights: (c)2006 NRC Canada
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 飯島 勇人

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