Arenas-Navarro Maribel, Oyama Ken, García-Oliva Felipe, Torres-Miranda Andrés, de la Riva Enrique G, Terrazas Teresa
Posgrado en Ciencias Biológicas, Unidad de Posgrado, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán CDMX CP 04510, México.
Escuela Nacional de Estudios Superiores (ENES) Unidad Morelia, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro 8701, Morelia, Michoacán CP 58190, México.
AoB Plants. 2021 Oct 18;13(6):plab066. doi: 10.1093/aobpla/plab066. eCollection 2021 Dec.
Oaks () are a dominant woody plant genus in the northern hemisphere, which occupy a wide range of habitats and are ecologically diverse. We analysed the wood anatomical traits, the variables derived and the relative hydraulic conductivity of 21 oak species to identify their performance according to abiotic factors, leaf phenological patterns and phylogenetic restrictions by analysing the interspecific variation along an environmental gradient. First, we determine the causes of anatomical trait variation in the oaks, analysing the functional trade-offs related to distribution along the environmental gradient. We measure the phenotypic plasticity of the anatomical traits to determine the role of environment and geographic distance in the range of phenotypic plasticity. Second, we examined if oaks co-occurred along the environmental gradient. Then we analysed if wood anatomical traits reflect differences among their phylogenetic section, leaf habit and a phylogenetic section/leaf habit category. Last, we tested the phylogenetic signal. Our results showed that vessel diameter, vessel frequency, wood density and relative hydraulic conductivity are the main axes of trait variation in the species analysed among leaf habit categories. The aridity index and seasonal precipitation drive the variation in the analysed traits. Higher environmental distance resulted in a higher relative distance plasticity index among traits. Co-occurrence of oak species with different leaf habits and phylogenetic trajectories may promote complementary resource acquisition. The phylogenetic signal in the oak species studied was low, which implies labile wood traits.
栎属植物是北半球占主导地位的木本植物属，它们占据广泛的栖息地，生态多样。我们分析了21种栎属植物的木材解剖特征、衍生变量和相对水力传导率，通过分析沿环境梯度的种间变异，根据非生物因素、叶片物候模式和系统发育限制来确定它们的表现。首先，我们确定栎属植物解剖特征变异的原因，分析与沿环境梯度分布相关的功能权衡。我们测量解剖特征的表型可塑性，以确定环境和地理距离在表型可塑性范围内的作用。其次，我们研究栎属植物是否沿环境梯度共存。然后我们分析木材解剖特征是否反映了它们的系统发育组、叶习性和系统发育组/叶习性类别之间的差异。最后，我们测试了系统发育信号。我们的结果表明，导管直径、导管频率、木材密度和相对水力传导率是所分析物种中叶习性类别之间特征变异的主要轴。干旱指数和季节性降水驱动了所分析特征的变异。更高的环境距离导致特征之间更高的相对距离可塑性指数。具有不同叶习性和系统发育轨迹的栎属植物共存可能促进互补资源获取。所研究的栎属植物的系统发育信号较低，这意味着木材特征不稳定。
