Patiño Sandra, Tyree Melvin T, Herre E Allen
Smithsonian Tropical Research Institute, P.O. Box 2072, Balboa, Republic of Panama.
Aiken Forestry Sciences Laboratory, 705 Spear Street, Burlington, Vermont, USA 05402.
New Phytol. 1995 Jan;129(1):125-134. doi: 10.1111/j.1469-8137.1995.tb03016.x.
Hydraulic parameters were measured in seven species of Fiats (three free-standing and four hemi-epiphytic) on stem segments of 3-35 mm in wood diameter. Parameters measured included K (water flux per unit pressure gradient), K (leaf specific conductivity =K per unit leaf area), K (specific conductivity =H per unit wood cross section), and H (Huber value = wood cross section per unit leaf area). The hemi-epiphytes tended to have less conductive stems per unit leaf area (lower K and invested less wood cross section per unit leaf area (lower H ) than free-standing species. Hydraulic parameters of Ficus are compared to 21 other temperate and tropical species to see if there is any discernible pattern in hydraulic architecture that correlates with phylogeny, growth form or habitat occupied by diverse species. Figs, as a group, had relatively high h . and relatively low h compared to other tropical trees. A possible correlation between K and transpiration and growth form is discussed.
在直径为3 - 35毫米的茎段上，对7种榕树（3种独立生长型和4种半附生型）的水力参数进行了测量。测量的参数包括K（单位压力梯度下的水流通量）、Kl（叶比导率 = K除以单位叶面积）、Ks（比导率 = K除以单位木材横截面积）和H（胡伯值 = 单位叶面积的木材横截面积）。与独立生长的物种相比，半附生植物每单位叶面积的茎传导性往往较低（较低的Kl），且每单位叶面积投入的木材横截面积较少（较低的H）。将榕树的水力参数与其他21种温带和热带物种进行比较，以查看在水力结构中是否存在与不同物种的系统发育、生长形式或栖息地相关的任何可识别模式。作为一个群体，榕树与其他热带树木相比，具有相对较高的h. 和相对较低的h 。讨论了K与蒸腾作用和生长形式之间可能的相关性。
