Manipulation of food resources by a gall-forming aphid

the physiology of sink-source interactions

Katherine C. Larson, Thomas G Whitham

Research output: Contribution to journalArticle

186 Citations (Scopus)

Abstract

We examined the capacity of the galling aphid, Pemphigus betae, to manipulate the sink-source translocation patterns of its host, narrowleaf cottonwood (Populus angustifolia). A series of 14C-labeling experiments and a biomass allocation experiment showed that P. betae galls functioned as physiologic sinks, drawing in resources from surrounding plant sources. Early gall development was dependent on aphid sinks increasing allocation from storage reserves of the stem, and later development of the progeny within the gall was dependent on resources from the galled leaf blade and from neighboring leaves. Regardless of gall position within a leaf, aphids intercepted 14C exported from the galled leaf (a non-mobilized source). However, only aphid galls at the most basal site of the leaf were strong sinks for 14C fixed in neighboring leaves (a mobilized source). Drawing resources from neighboring leaves represents active herbivore manipulation of normal host transport patterns. Neighboring leaves supplied 29% of the 14C accumulating in aphids in basal galls, while only supplying 7% to aphids in distal galls. This additional resource available to aphids in basal galls can account for the 65% increase in progeny produced in basal galls compared to galls located more distally on the leaf and limited to the galled leaf as a food resource. Developing furits also act as skins and compete with aphid-induced sinks for food supply. Aphid success in producing galls was increased 31% when surrounding female catkins were removed.

Original languageEnglish (US)
Pages (from-to)15-21
Number of pages7
JournalOecologia
Volume88
Issue number1
DOIs
StatePublished - Sep 1991

Fingerprint

gall
galls
aphid
physiology
Aphidoidea
food
resource
leaves
Pemphigus betae
Populus angustifolia
biomass allocation
dry matter partitioning
food supply
skin (animal)
leaf blade
translocation
herbivore
skin
herbivores
inflorescences

Keywords

  • Galls
  • Herbivory
  • Phloem-parasites
  • Sink-source
  • Translocation

ASJC Scopus subject areas

  • Ecology

Cite this

Manipulation of food resources by a gall-forming aphid : the physiology of sink-source interactions. / Larson, Katherine C.; Whitham, Thomas G.

In: Oecologia, Vol. 88, No. 1, 09.1991, p. 15-21.

Research output: Contribution to journalArticle

@article{08a22fc8c2ca4aec8c25a0d22393ddfb,
title = "Manipulation of food resources by a gall-forming aphid: the physiology of sink-source interactions",
abstract = "We examined the capacity of the galling aphid, Pemphigus betae, to manipulate the sink-source translocation patterns of its host, narrowleaf cottonwood (Populus angustifolia). A series of 14C-labeling experiments and a biomass allocation experiment showed that P. betae galls functioned as physiologic sinks, drawing in resources from surrounding plant sources. Early gall development was dependent on aphid sinks increasing allocation from storage reserves of the stem, and later development of the progeny within the gall was dependent on resources from the galled leaf blade and from neighboring leaves. Regardless of gall position within a leaf, aphids intercepted 14C exported from the galled leaf (a non-mobilized source). However, only aphid galls at the most basal site of the leaf were strong sinks for 14C fixed in neighboring leaves (a mobilized source). Drawing resources from neighboring leaves represents active herbivore manipulation of normal host transport patterns. Neighboring leaves supplied 29{\%} of the 14C accumulating in aphids in basal galls, while only supplying 7{\%} to aphids in distal galls. This additional resource available to aphids in basal galls can account for the 65{\%} increase in progeny produced in basal galls compared to galls located more distally on the leaf and limited to the galled leaf as a food resource. Developing furits also act as skins and compete with aphid-induced sinks for food supply. Aphid success in producing galls was increased 31{\%} when surrounding female catkins were removed.",
keywords = "Galls, Herbivory, Phloem-parasites, Sink-source, Translocation",
author = "Larson, {Katherine C.} and Whitham, {Thomas G}",
year = "1991",
month = "9",
doi = "10.1007/BF00328398",
language = "English (US)",
volume = "88",
pages = "15--21",
journal = "Oecologia",
issn = "0029-8519",
publisher = "Springer Verlag",
number = "1",

}

TY - JOUR

T1 - Manipulation of food resources by a gall-forming aphid

T2 - the physiology of sink-source interactions

AU - Larson, Katherine C.

AU - Whitham, Thomas G

PY - 1991/9

Y1 - 1991/9

N2 - We examined the capacity of the galling aphid, Pemphigus betae, to manipulate the sink-source translocation patterns of its host, narrowleaf cottonwood (Populus angustifolia). A series of 14C-labeling experiments and a biomass allocation experiment showed that P. betae galls functioned as physiologic sinks, drawing in resources from surrounding plant sources. Early gall development was dependent on aphid sinks increasing allocation from storage reserves of the stem, and later development of the progeny within the gall was dependent on resources from the galled leaf blade and from neighboring leaves. Regardless of gall position within a leaf, aphids intercepted 14C exported from the galled leaf (a non-mobilized source). However, only aphid galls at the most basal site of the leaf were strong sinks for 14C fixed in neighboring leaves (a mobilized source). Drawing resources from neighboring leaves represents active herbivore manipulation of normal host transport patterns. Neighboring leaves supplied 29% of the 14C accumulating in aphids in basal galls, while only supplying 7% to aphids in distal galls. This additional resource available to aphids in basal galls can account for the 65% increase in progeny produced in basal galls compared to galls located more distally on the leaf and limited to the galled leaf as a food resource. Developing furits also act as skins and compete with aphid-induced sinks for food supply. Aphid success in producing galls was increased 31% when surrounding female catkins were removed.

AB - We examined the capacity of the galling aphid, Pemphigus betae, to manipulate the sink-source translocation patterns of its host, narrowleaf cottonwood (Populus angustifolia). A series of 14C-labeling experiments and a biomass allocation experiment showed that P. betae galls functioned as physiologic sinks, drawing in resources from surrounding plant sources. Early gall development was dependent on aphid sinks increasing allocation from storage reserves of the stem, and later development of the progeny within the gall was dependent on resources from the galled leaf blade and from neighboring leaves. Regardless of gall position within a leaf, aphids intercepted 14C exported from the galled leaf (a non-mobilized source). However, only aphid galls at the most basal site of the leaf were strong sinks for 14C fixed in neighboring leaves (a mobilized source). Drawing resources from neighboring leaves represents active herbivore manipulation of normal host transport patterns. Neighboring leaves supplied 29% of the 14C accumulating in aphids in basal galls, while only supplying 7% to aphids in distal galls. This additional resource available to aphids in basal galls can account for the 65% increase in progeny produced in basal galls compared to galls located more distally on the leaf and limited to the galled leaf as a food resource. Developing furits also act as skins and compete with aphid-induced sinks for food supply. Aphid success in producing galls was increased 31% when surrounding female catkins were removed.

KW - Galls

KW - Herbivory

KW - Phloem-parasites

KW - Sink-source

KW - Translocation

UR - http://www.scopus.com/inward/record.url?scp=0026267684&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026267684&partnerID=8YFLogxK

U2 - 10.1007/BF00328398

DO - 10.1007/BF00328398

M3 - Article

VL - 88

SP - 15

EP - 21

JO - Oecologia

JF - Oecologia

SN - 0029-8519

IS - 1

ER -