Influence of greenbug on root growth of resistant and susceptible barley genotypes

Castro, Ana María; Rumi, Clara P.; Arriaga, H. O.

doi:10.1016/0098-8472(88)90047-0

Cited by 16 publications

(13 citation statements)

References 11 publications

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“…From around 730 nm to 900 nm, the greenbug-damaged wheat canopies had lower reßectance than undamaged wheat. This was most likely due to degenerated internal leaf structure, reduced leaf area, and stunting plants caused by greenbug feeding (Castro and Rumi 1987, Castro et al 1988, Morgham et al 1994. Spectral responses of Þeld bean leaf infected by Botrytis fabae (Malthus and Madeira 1993) and winter wheat infested by greenbug (Riedell and Blackmer 1999) showed similar patterns in reßectance shift.…”

Section: Discussionsupporting

confidence: 52%

“…Greenbugs inject toxic salivary secretions into plant cells, which break down cell walls to facilitate feeding as they extract plant nutrients. Greenbug feeding causes signiÞcantly lowered dry weight, leaf area, aerial growth, chlorophyll content, and consequently the photosynthetic rate of barley, Hordeum vulgare L.; sorghum, Sorghum bicolor L.; and wheat (Castro et al 1988;Riedell and Blackmer 1999;Nagaraj et al 2002a,b). Furthermore, severe degenerative changes in vascular cells of susceptible wheat can be caused by greenbug feeding.…”

mentioning

confidence: 97%

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Hyperspectral Spectrometry as a Means to Differentiate Uninfested and Infested Winter Wheat by Greenbug (Hemiptera: Aphididae)

Mırık

Michels²,

Kassymzhanova-Mirik³

et al. 2006

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Although spectral remote sensing techniques have been used to study many ecological variables and biotic and abiotic stresses to agricultural crops over decades, the potential use of these techniques for greenbug, Schizaphis graminum (Rondani) (Hemiptera: Aphididae) infestations and damage to wheat, Triticum aestivum L., under field conditions is unknown. Hence, this research was conducted to investigate: 1) the applicability and feasibility of using a portable narrow-banded (hyperspectral) remote sensing instrument to identify and discern differences in spectral reflection patterns (spectral signatures) of winter wheat canopies with and without greenbug damage; and 2) the relationship between miscellaneous spectral vegetation indices and greenbug density in wheat canopies growing in two fields and under greenhouse conditions. Both greenbug and reflectance data were collected from 0.25-, 0.37-, and 1-m2 plots in one of the fields, greenhouse, and the other field, respectively. Regardless of the growth conditions, greenbug-damaged wheat canopies had higher reflectance in the visible range and less in the near infrared regions of the spectrum when compared with undamaged canopies. In addition to percentage of reflectance comparison, a large number of spectral vegetation indices drawn from the literature were calculated and correlated with greenbug density. Linear regression analyses revealed high relationships (R2 ranged from 0.62 to 0.85) between greenbug density and spectral vegetation indices. These results indicate that hyperspectral remotely sensed data with an appropriate pixel size have the potential to portray greenbug density and discriminate its damage to wheat with repeated accuracy and precision.

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Section: Discussionsupporting

confidence: 52%

mentioning

confidence: 97%

Hyperspectral Spectrometry as a Means to Differentiate Uninfested and Infested Winter Wheat by Greenbug (Hemiptera: Aphididae)

Mırık

Michels²,

Kassymzhanova-Mirik³

et al. 2006

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“…It is our contention that GB-feeding damage resulting in loss of chlorophyll and senescence in "assimilate source" leaves applies an additional plant stress that further depresses root dry matter accumulation and elongation at certain times during the plant developmental sequence. This contention is supported by the work of Castro et al (16) who found that greenbug damage-induced root growth reduction was less in barley genotypes that did not show leaf chlorosis under greenbug attack than in genotypes that did. …”

Section: Results and Discussion Plant Reaction To Aphid Feeding Damagementioning

confidence: 72%

Feeding damage effects of three aphid species on wheat root growth

Riedell¹,

Kieckhefer²

1995

Journal of Plant Nutrition

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Cereal aphid infestations have considerable impact upon productivity and profitability of United States agriculture. A comparison study of the influence of different aphid species (Russian wheat aphid, Duraphis noxia Mordvilko; greenbug, Schizaphis graminum Rondani; and bird cherry oat aphid, Rhopalosiphum padi L.) upon shoot characteristics and root growth of hard red spring wheat (Triticum aestivum L.) was conducted in an attempt to better understand the mechanisms of yield loss in aphid damaged plants. Plants infested with aphids showed similar reductions in shoot growth regardless of aphid species. Shoot chlorophyll concentrations were lowest in greenbug-infested plants. Root length and dry weight were also equally reduced by feeding damage by the three aphid species. Upon removal of the aphids, shoot dry weights of plants damaged by each aphid species remained unchanged for 10 days. Shoot dry weights for aphid-damaged plants were about half the magnitude seen in the control plants after 15 days. Chlorophyll concentrations seen in greenbug and Russian wheat aphidinfested plants initially were lower than the concentrations seen in bird cherry oat aphid-infested and control plants. Within 10 days after aphid removal, however, chlorophyll concentrations across all treatments were essentially equal. Root lengths in plants previously infested with greenbugs or Russian wheat aphids were lower than control plants four days after aphid removal. Within 10 days after aphid removal, root lengths in plants previously infested with greenbugs or Russian wheat aphids did not differ from control plants. Root lengths in plants previously damaged by bird cherry oat aphids did not reach the same magnitude as that of the 1881

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“…For crop plants, studies have found genetic variation in compensatory ability (e.g., Bohn et al 1973;Ortega et al 1980;Soper et al 1984;Castro et al 1988;Dale et al 1988). However, these studies did not determine whether compensatory ability was correlated with fitness when damaged.…”

Section: Discussionmentioning

confidence: 99%

“…This expectation has enticed many researchers to equate compensatory ability with relative fitness when damaged (Bohn et al 1973;Ortega et al 1980;Soper et al 1984;Castro et al 1988;Dale et al 1988;Simms and Triplett The potential for and constraints on the evolution of compensatory ability in Asclepias syriaca Fineblum and Rausher 1995;Houle and Simard 1996;Harms and Dalling 1997;Shen and Bach 1997). However, intrinsic growth rates may explain intra-populational differences in plant fitness when damaged; plants that have higher intrinsic growth rates could achieve greater size and have greater reproduction than slower growing plants, whether plants experience damage or not.…”

Section: Introductionmentioning

confidence: 99%

The potential for and constraints on the evolution of compensatory ability in Asclepias syriaca

2000

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To investigate the potential for and constraints on the evolution of compensatory ability, we performed a greenhouse experiment using Asclepias syriaca in which foliar damage and soil nutrient concentration were manipulated. Under low nutrient conditions, significant genetic variation was detected for allocation patterns and for compensatory ability. Furthermore, resource allocation to storage was positively, genetically correlated both with compensatory ability and biomass when damaged, the last two being positively, genetically correlated with each other. Thus, in the low nutrient environment, compensatory ability via resource allocation to storage provided greater biomass when damaged. A negative genetic correlation between compensatory ability and plant biomass when undamaged suggests that this mechanism entailed an allocation cost, which would constrain the evolution of greater compensatory ability when nutrients are limited. Under high nutrient conditions, neither compensatory ability nor allocation patterns predicted biomass when damaged, even though genetic variation in compensatory ability existed. Instead, plant biomass when undamaged predicted biomass when damaged. The differences in outcomes between the two nutrient treatments highlight the importance of considering the possible range of environmental conditions that a genotype may experience. Furthermore, traits that conferred compensatory ability did not necessarily contribute to biomass when damaged, demonstrating that it is critical to examine both compensatory ability and biomass when damaged to determine whether selection by herbivores can favor the evolution of increased compensation.

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Influence of greenbug on root growth of resistant and susceptible barley genotypes

Cited by 16 publications

References 11 publications

Hyperspectral Spectrometry as a Means to Differentiate Uninfested and Infested Winter Wheat by Greenbug (Hemiptera: Aphididae)

Hyperspectral Spectrometry as a Means to Differentiate Uninfested and Infested Winter Wheat by Greenbug (Hemiptera: Aphididae)

Feeding damage effects of three aphid species on wheat root growth

The potential for and constraints on the evolution of compensatory ability in Asclepias syriaca

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