Differences in the allocation patterns between liana and shrubHydrangeaspecies

Abstract

Allometric analysis of four Hydrangea species ( Hydrangea petiolaris , Hydrangea paniculata , Hydrangea macrophylla var. megacarpa and Hydrangea hirta ) was conducted to test the hypothesis that the liana species ( H. petiolaris ) invests more in leaves and reproductive organs than the shrub species. We calculated the allocation ratios of leaves, supporting tissues (trunks and roots) and reproductive organs. Hydrangea petiolaris differed markedly from the three shrubs in terms of trunk and root allocations, while leaf allocation was not statistically different. The C/F ratios (the ratios of the dry weights of nonphotosynthetic organs to photosynthetic ones) of the four species ranged from 9 to 12, and were not statistically different. These results did not support the hypothesis. The biomass of H. petiolaris was up to 100-fold greater than the biomass of the three shrubs. The growth form of H. petiolaris would minimize allocation to supporting tissue and produce a large biomass. The biomass of reproductive organs of H. petiolaris was up to 700-fold greater than the biomass of the three shrubs. This advantage might, therefore, serve as a driving force for the evolution of lianas.

Variations in leaf stomatal density and distribution of 53 vine species in Japan

“…1994; Hikosaka 1996), daytime leaf gas exchange characteristics (Tay et al . 2007), shoot morphology and reproductive characteristics (Gianoli 2002; Kaneko & Homma 2006), effects on the growth of host plants and the structure/microenvironment of plant communities (Pinard & Putz 1994; Gough & Grace 1997; Perez‐Salicrup & Barker 2000), effects on biodiversity in the vine‐invaded ecosystems (Ogle et al . 2000), and their effects on forest management practices (Johns et al .…”

“…There is only one piece of information on the fundamental biology of vines. Previous studies of vines have focused on their water relations (Ewers et al 1989;Gartner et al 1990), changes in leaf nutrient status along with leaf aging (Hikosaka et al 1994;Hikosaka 1996), daytime leaf gas exchange characteristics (Tay et al 2007), shoot morphology and reproductive characteristics (Gianoli 2002;Kaneko & Homma 2006), effects on the growth of host plants and the structure/microenvironment of plant communities (Pinard & Putz 1994;Gough & Grace 1997;Perez-Salicrup & Barker 2000), effects on biodiversity in the vine-invaded ecosystems (Ogle et al 2000), and their effects on forest management practices (Johns et al 1996). In contrast, there have been no studies about the leaf-level structural characteristics of vine species in Japanese flora.…”

Factors Affecting to Allocation in Plants

“…Bu nedenle, açık kanopiler altındaki lian formundaki bitkiler, destek dokularına (ör. gövdelerine) minimum yatırım yaparken, makro besin maddelerini yapraklara veya üreme organlarına tahsis ederler (Kaneko and Homma, 2006;Hermans et al, 2006).…”

“…Örneğin Hydrangea (Hydrangeaceae) cinsine ait lian formundaki türlerin çalı formunda olanlara oranla, biyomaslarını daha çok yaprak ve üreme organlarına alloke ettikleri belirlenmiştir (Kaneko and Homma, 2006). Çünkü lian formundaki bitkiler diğer bitkilere sarılarak yükselmeye ve ışık almaya çalıştıkları için ince bir gövdeye sahip olup, topraktan besin alımı için ince kökler üretmeleri yeterlidir.…”

“…Buna nedenle lian yaşam formuna sahip H. petiolaris türü ile çalı formundaki diğer türlerin reprodüktif organlarının özellikleri de farklıdır (Çizelge 4). Bu durum lianların evrimsel süreçleri bakımından da önemlidir (Kaneko and Homma, 2006 …”