Abstract
Abstract The possible repercussions of decreasing water availability in plant–insect interactions largely remain unclear. To study this, we designed two factorial studies applying two levels of water stress to Brassica oleraceae var. capitata L. (Brassicaceae) plants inoculated with the aphid Myzus persicae Sulzer (Hemiptera: Aphididae: Macrosiphini). One study investigated the effect of aphids and water stress on leaf water potential components, aphid population size, aphid intrinsic rate of increase (r m ), and fecundity. The other investigated the effect of aphids and water stress on gas exchange, leaf fluorescence yield, estimation of leaf chlorophyll, and above‐ground dry weight. Drought treatment reduced the size of the M. persicae population. Aphid numbers were strongly and positively correlated with soil moisture and negatively correlated with leaf temperature. Aphids on droughted plants had lower r m and lower fecundity per aphid. Under aphid stress, plants showed reduced maximum photosynthetic rate (A max ), lower leaf chlorophyll as estimated by soil plant analysis development (SPAD) values, higher osmotic potential, and reduced final above‐ground dry weight compared with control plants. Aphid infestation also led to significantly higher leaf water potentials and reduced light‐adapted fluorescence yield. Compared with control plants, water‐stressed plants showed reduced A max , lower SPAD values, reduced leaf water potential, lower turgor, and reduced final above‐ground dry weight. Osmotic potential was lower in droughted plants when aphids were not present. Plants under combined aphid and water stress showed significantly reduced SPAD and final above‐ground dry weight, with comparatively higher leaf water potentials. These results show that aphid infestation limits solute accumulation in the vacuole of drought stressed cabbage. Aphid infestation reduced the host’s ability to photosynthesise optimally and led to reduced growth. Plant stress hypotheses propose that a senescence feeder such as M. persicae would show higher rates of growth in response to the increasing ‘quality’ of the phloem sap under water shortage. In the case of M. persicae , our results do not support the hypothesis that drought leads to improved aphid population growth and survival.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 18
Claim · model-written summary
Drought reduced the M. persicae population.
- Taxon
- Brassica oleracea var. capitata
Brassica oleracea var. capitatat0 - Treatment
- Drought treatmente0
- Interactor
- M. persicae
Myzus persicaee0pest - Outcome
- size of the M. persicae populatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought treatment reduced the size of the M. persicae population”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid numbers were positively correlated with soil moisture.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- soil moisturee0
- Interactor
- Aphide0pest
- Outcome
- Aphid numberse0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphid numbers were strongly and positively correlated with soil moisture and negatively correlated with leaf temperature”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid numbers were negatively correlated with leaf temperature.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- leaf temperaturee0
- Interactor
- Aphide0pest
- Outcome
- Aphid numberse0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphid numbers were strongly and positively correlated with soil moisture and negatively correlated with leaf temperature”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphids on droughted plants had a lower intrinsic rate of increase.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- droughted plantse0
- Interactor
- AphidsAphidomorphae0pest
- Outcome
- r me0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphids on droughted plants had lower r m and lower fecundity per aphid”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphids on droughted plants had lower fecundity.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- droughted plantse0
- Interactor
- AphidsAphidomorphae0pest
- Outcome
- fecundity per aphide0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphids on droughted plants had lower r m and lower fecundity per aphid”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid stress reduced maximum photosynthetic rate and leaf chlorophyll.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- aphid stresse0
- Interactor
- aphide0pest
- Outcome
- maximum photosynthetic rate (A max ), lower leaf chlorophyll as estimated by soil plant analysis development (SPAD) valuese0
- Direction
- reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under aphid stress, plants showed reduced maximum photosynthetic rate (A max ), lower leaf chlorophyll as estimated by soil plant analysis development (SPAD) values, higher osmotic potential, and reduced final above‐ground dry weight compared with control plants”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid stress raised osmotic potential.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- aphid stresse0
- Interactor
- aphide0pest
- Outcome
- osmotic potentiale0
- Direction
- highere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under aphid stress, plants showed reduced maximum photosynthetic rate (A max ), lower leaf chlorophyll as estimated by soil plant analysis development (SPAD) values, higher osmotic potential, and reduced final above‐ground dry weight compared with control plants”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid stress reduced final above-ground dry weight.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- aphid stresse0
- Interactor
- aphide0pest
- Outcome
- final above‐ground dry weighte0
- Direction
- reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under aphid stress, plants showed reduced maximum photosynthetic rate (A max ), lower leaf chlorophyll as estimated by soil plant analysis development (SPAD) values, higher osmotic potential, and reduced final above‐ground dry weight compared with control plants”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid infestation raised leaf water potential significantly.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- Aphid infestatione0
- Interactor
- Aphide0pest
- Outcome
- leaf water potentialse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphid infestation also led to significantly higher leaf water potentials and reduced light‐adapted fluorescence yield”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid infestation reduced light-adapted fluorescence yield.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- Aphid infestatione0
- Interactor
- Aphide0pest
- Outcome
- light‐adapted fluorescence yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphid infestation also led to significantly higher leaf water potentials and reduced light‐adapted fluorescence yield”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Water stress reduced photosynthetic rate and SPAD values.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- water‐stressed plantse0
- Outcome
- A max , lower SPAD valuese0
- Direction
- reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control plants, water‐stressed plants showed reduced A max , lower SPAD values, reduced leaf water potential, lower turgor, and reduced final above‐ground dry weight”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Water stress reduced leaf water potential and turgor.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- water‐stressed plantse0
- Outcome
- leaf water potential, lower turgore0
- Direction
- reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control plants, water‐stressed plants showed reduced A max , lower SPAD values, reduced leaf water potential, lower turgor, and reduced final above‐ground dry weight”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Water stress reduced final above-ground dry weight.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- water‐stressed plantse0
- Outcome
- final above‐ground dry weighte0
- Direction
- reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control plants, water‐stressed plants showed reduced A max , lower SPAD values, reduced leaf water potential, lower turgor, and reduced final above‐ground dry weight”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Drought lowered osmotic potential when aphids were absent.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- droughted plantse0
- Outcome
- Osmotic potentiale0
- Direction
- lowere0
- Qualifier
- aphids were not presente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Osmotic potential was lower in droughted plants when aphids were not present”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Combined aphid and water stress significantly reduced SPAD and final above-ground dry weight.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- combined aphid and water stresse0
- Interactor
- aphide0pest
- Outcome
- SPAD and final above‐ground dry weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants under combined aphid and water stress showed significantly reduced SPAD and final above‐ground dry weight, with comparatively higher leaf water potentials”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Combined aphid and water stress yielded comparatively higher leaf water potential.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Treatment
- combined aphid and water stresse0
- Interactor
- aphide0pest
- Outcome
- leaf water potentialse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants under combined aphid and water stress showed significantly reduced SPAD and final above‐ground dry weight, with comparatively higher leaf water potentials”
t0“Brassica oleracea var. capitata”
Claim · model-written summary
Aphid infestation limited vacuolar solute accumulation in drought-stressed cabbage.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- aphid infestatione0
- Interactor
- aphide0pest
- Outcome
- solute accumulation in the vacuolee0
- Direction
- limitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results show that aphid infestation limits solute accumulation in the vacuole of drought stressed cabbage”
Claim · model-written summary
The authors found no support for improved aphid population growth and survival under drought.
- Taxon
- Brassica oleracea var. capitataBrassica oleracea var. capitatat0
- Interactor
- aphide0pest
- Outcome
- aphid population growth and survivale0
- Direction
- do not supporte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our results do not support the hypothesis that drought leads to improved aphid population growth and survival”
t0“Brassica oleracea var. capitata”
The same questions in other papers
drought · growth · Brassica oleracea (wild cabbage)Results differ
13 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 papers →infection · yield · Brassica oleracea (wild cabbage)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
1 paper more in this group
See all 5 papers →drought · physiology: water · Brassica oleracea (wild cabbage)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
3 papers more in this group
See all 7 papers →drought · Myzus persicae · Brassica oleracea (wild cabbage)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.