来自以色列的科学家在期刊Forest上利用Plantarray植物功能生理表型系统发表了题为“Comparison of Morphological and Physiological Traits between Pinus brutia, Pinus halepensis, and Their Vigorous F1 Hybrids”的文章。

布鲁氏松、黑松及其强壮F1杂种的形态和生理特性比较

摘要

主要就布鲁氏松杂交种和黑松增长率进行了调查。尽管杂交种耐受布鲁氏菌，很少有注意到影响耐旱因素。为了解优良的杂种表型，我们研究了P. brutia, P. halepensis及其强壮的杂种。有根插条从成熟树木中繁殖，并在高通量重力系统中进行检测，以评估其对干旱的响应。与两个亲本相比，杂交种的根冠比、针叶长度和单位面积叶质量（LMA）较高。盐芥的蒸腾速率（E）和气孔导度（gsc）均高于P. brutia，以及早期减少E和gsc以应对干旱胁迫。类似于P. brutia，杂种表现出较低的E和gsc，并且气孔早期关闭以应对干旱，类似于P. halepensis。我们的研究表明，杂交种表现出一种独特的特性组合，可能有助于在经历气候变化的半干旱地区的森林恢复力。 

关键词：高山松；布鲁氏松；杂种；干旱；形态特征；生理特性

Comparison of Morphological and Physiological Traits between Pinus brutia, Pinus halepensis, and Their Vigorous F1 Hybrids 

Abstract

Hybrids between Pinus brutia Ten. and Pinus halepensis Mill. have mainly been investigated with respect to their growth rate. Less attention has been paid to factors that contribute to their resistance to drought, although the hybrids have been shown to thrive over P. brutia in semi-arid regions. To understand the superior hybrid phenotype, we investigated morphological traits, growth parameters, and physiological response to drought stress in P. brutia, P. halepensis, and their vigorous hybrids. Rooted cuttings were propagated from mature trees and were examined in a high-throughput gravimetric system to evaluate their response to drought. Higher root-to-shoot ratio, needle length, and leaf mass per area (LMA) were observed in the hybrids compared to the two parental species. P. halepensis demonstrated higher transpiration rates (E) and stomatal conductance (gsc) than P. brutia, and an earlier reduction in E and gsc in response to drought stress. Similar to P. brutia, the hybrids showed low E and gsc, and an early stomatal closure in response to drought similar to P. halepensis. Our study suggests that the hybrids exhibit a unique combination of traits that may contribute to forest resilience in semi-arid regions undergoing climate change.  

Keywords: Pinus halepensis; Pinus brutia; hybrids; drought; morphological traits; physiological traits