A hidden herbivory effect on Sphagnum reproduction

被引：1

作者：

Chen, Y. -D. ^{[1
,2
,3
]}

Liu, C. ^{[1
,4
,5
]}

Moles, A. ^{[6
]}

Jassey, V. E. J. ^{[7
]}

Bu, Z. -J. ^{[1
,2
,3
,8
]}

机构：

[1] Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun, Peoples R China

[2] Northeast Normal Univ, Inst Peat & Mire Res, State Environm Protect Key Lab Wetland Ecol & Vege, Changchun, Peoples R China

[3] Jilin Prov Key Lab Wetland Ecol Proc & Environm Ch, Changchun, Peoples R China

[4] Univ Laval, Peatland Ecol Res Grp, Quebec City, PQ, Canada

[5] Univ Laval, Ctr Northern Studies, Quebec City, PQ, Canada

[6] UNSW Sydney, Sch Biol Earth & Environm Sci, Kensington, NSW 2033, Australia

[7] Univ Paul Sabatier, Lab Ecol Fonct & Environm LEFE, CNRS, Toulouse, France

[8] Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Renmin 5268, Changchun 130024, Peoples R China

来源：

PLANT BIOLOGY | 2024年 / 26卷 / 02期

关键词：

Capsules; defence cost; herbivory; peat moss; peatland; spore; trade-off; TRADE-OFFS; INDUCED DEFENSES; PLANT DEFENSE; GROWTH; CONSEQUENCES; FITNESS; RESPONSES; BRYOPHYTES; ALLOCATION; RESISTANCE;

D O I：

10.1111/plb.13610

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Defence theories provide predictions about trade-offs in the allocation of resources to defence and growth. However, very little is known about how pressure from herbivores influences the allocation of resources during reproduction. Two common peatland bryophyte species, Sphagnum angustifolium and S. capillifolium, were chosen as study species. Vegetative and reproductive shoots of both Sphagnum species were subjected to treatments with and without herbivores in a lab experiment. After 4 weeks of exposure to herbivores in a growth chamber, we measured biomass production, net photosynthesis rate, defence traits (phenolics in leachate and phenolics in extract), nonstructural carbohydrates (soluble sugar and starch), and reproductive traits (capsule number, weight and diameter, and spore germination) of both Sphagnum species. Reproductive shoots had higher constitutive defence than vegetative shoots in S. angustifolium, and a similar pattern was observed in S. capillifolium. With herbivory, reproductive shoots showed stronger induced defence (released more phenolics) than vegetative shoots in S. capillifolium, but not in S. angustifolium. Herbivory had no effect on capsule number, weight, or diameter, but reduced spore germination percentage by more than half in both species. Our study highlights the hidden effects of herbivory on reproduction of Sphagnum and indicates the presence of maternal effects in bryophytes. Ecologists will benefit from examining both quality- and quantity-based traits when attempting to estimate the herbivory effect on plant fitness.

引用

页码：214 / 222

页数：9

共 63 条

[1] Transgenerational consequences of plant responses to herbivory: An adaptive maternal effect? [J].