Altitudinal Patterns of Leaf Traits and Leaf Allometry in Bamboo Pleioblastus amarus.
Altitudinal Patterns of Leaf Traits and Leaf Allometry in Bamboo Pleioblastus amarus.
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苦竹叶片性状的海拔格局及叶片异速生长
DOI：
10.3389/fpls.2018.01110
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发表时间：
2018
影响因子：
5.6
通讯作者：
Yang Q
中科院分区：
文献类型：
--
作者：
Guo Z;Lin H;Chen S;Yang Q
意识到一个单一的物种和这些特征之间的关系，它们对海拔高度的依赖叶的局部尺度变化的生态生理过程外推到生态系统的水平可能是必不可少的。虽然叶性状的海拔模式已被广泛研究的一些物种，很少有人知道这样的模式在竹。分析了苦竹在3个不同海拔高度（200、400和800 m）下的叶功能性状及其异速生长关系。随着海拔的升高，叶片的长、宽、周长、面积、干重和含水量等功能性状均显著下降，而叶长宽比则显著增加，叶片有变窄的趋势。比叶面积呈先增大后减小的趋势，而叶片干物质含量的变化则呈相反的趋势。叶面积与叶长、叶宽、叶周长呈显著正相关，与叶长宽比呈显著负相关。随着海拔高度的增加，叶面积的这些关系的斜率先增加，然后下降。叶生物量与叶长、叶宽、叶周长和叶面积呈正相关，在所有海拔高度上的关系斜率相同。因此，该竹种的叶片在中海拔具有最高的比叶面积和最低的叶片干物质含量。研究结果表明，该竹种具有较大的生长潜力和形态可塑性。
Awareness of local-scale variation in leaf traits for a single species and the relationships between these traits and their dependence on altitude might be essential for extrapolating ecophysiological processes from the leaf to the ecosystem level. While altitudinal patterns of leaf traits have been extensively studied in a number of species, little is known about such patterns in bamboos. We analyzed leaf functional traits and leaf allometric relationships of Pleioblastus amarus at three different altitudes (200, 400, and 800 m). With increasing altitude, most functional traits, including leaf length, width, perimeter, area, dry weight, and water content, decreased significantly, while the leaf length:width ratio exhibited a marked increase, resulting in a tendency toward narrow leaves. Specific leaf area first increased, and then decreased, while the change in leaf dry matter content showed the opposite trend. Leaf area was positively correlated with leaf length, leaf width and leaf perimeter, but negatively correlated with the leaf length:width ratio. With increasing altitude, the slopes of these relationships for leaf area first increased, and then decreased. Leaf biomass was positively correlated with leaf length, width, perimeter, and area, with the slopes of the relationships being the same at all altitudes. Thus, the leaves of this bamboo species at middle altitude have the highest specific leaf area and lowest leaf dry matter content. Our findings suggest that this bamboo species has a big potential of growth and morphological plasticity.
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