Waterlogging under simulated late-winter conditions had little impact on the physiology and growth of Norway spruce seedlings

作者：Wang Ai Fang; Roitto Marja; Lehto Tarja; Zwiazek Janusz J; Calvo Polanco Monica; Repo Tapani^*

来源：Annals of Forest Science, 2013, 70(8): 781-790.

DOI：10.1007/s13595-013-0325-5

• Climate change
• Dormancy
• Waterlogging
• Hypoxia
• Root

Waterlogging is predicted to become more common in boreal forests during winter and early spring with climate change. So far, little is known about the waterlogging tolerance of boreal tree species during their winter dormancy. %26lt;br%26gt;The aim was to quantify the degree of waterlogging tolerance of 1-year-old dormant Norway spruce (Picea abies (L.) Karst.) seedlings. %26lt;br%26gt;The seedlings were exposed to waterlogging in a growth chamber at temperature of 2 A degrees C for 4 weeks and then allowed to recover for 6 weeks during the growth stage. Shoot and root responses were monitored by physiological and growth measurements. %26lt;br%26gt;No effect was found in the seedling biomass, but root mortality increased slightly during the early growth stage following waterlogging. The water potential of the needles became less negative at the end of the waterlogging and the early growth stage. The ratio of apoplastic to symplastic electrical resistance (R (e)/R (i)) of the needles was lower after waterlogging, indicating changes in the proportions of symplastic and apoplastic space. No differences were found between the treatments in the dark-acclimated chlorophyll fluorescence (F (v)/F (m)) of the needles. Slightly greater accumulation of starch and temporary reductions of some mineral nutrients in needles were found after waterlogging. %26lt;br%26gt;We conclude that in late winter and early spring, Norway spruce seedlings potentially tolerate short periods of waterlogging.

• 出版日期2013-12