The control of Phytophthora root rot of avocado with fungicides and the effect of this disease on water relations, yield and ring neck.

Whiley, A. W.; Pegg, K. G.; Saranah, J. B.; Forsberg, L. I.

doi:10.1071/ea9860249

Cited by 19 publications

(15 citation statements)

References 8 publications

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“…Surveys have indicated that the incidence of Botryosphaeria species is strongly correlated with the presence of a physiological condition, known as ring-neck necrosis (Fig. 4), believed to be caused by an internal water deficit at a critical time in fruit development (Whiley et al 1986). The broken surface of the necrotic lesion on the pedicel forms a highly suitable site for invasion by the fungi.…”

Section: Botryosphaeria/fusicoccum Have Been Isolated Frommentioning

confidence: 99%

Post-harvest diseases of avocado fruits in New Zealand

Hartill¹

1991

New Zealand Journal of Crop and Horticultural Science

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Section: Botryosphaeria/fusicoccum Have Been Isolated Frommentioning

confidence: 99%

Post-harvest diseases of avocado fruits in New Zealand

Hartill¹

1991

New Zealand Journal of Crop and Horticultural Science

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“…() and Whiley et al. (), who compared field transpiration values and stomatal conductance of P. cinnamomi ‐infected avocado trees with uninfected control plants.…”

Section: Physiological Biochemical and Molecular Reactions Of Infectmentioning

confidence: 99%

Strategies of attack and defence in woody plant–Phytophthora interactions

et al. 2014

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Summary This review comprises both well‐known and recently described Phytophthora species and concentrates on Phytophthora–woody plant interactions. First, comprehensive data on infection strategies are presented which were the basis for three models that explain invasion and spread of Phytophthora pathogens in different woody host plants. The first model describes infection of roots, the second concentrates on invasion of the trunk, and the last one summarizes infection and invasion of host plants via leaves. On the basis of morphological, physiological, biochemical and molecular data, scenarios are suggested which explain the sequences of reactions that occur in susceptible and tolerant plants following infections of roots or of stem bark. Particular emphasis is paid to the significance of Phytophthora elicitins for such host–pathogen interactions. The overall goal is to shed light on the sequences of pathogenesis to better understand how Phytophthora pathogens harm their host plants.

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“…(Williams et al 1977;Fenn and Coey 1984;Whiley et al 1986). Fungicides based on Phi are widely used in agriculture for controlling soil-borne plant pathogens belonging to the order Oomycetes, particularly Phytophthora sp.…”

Section: Introductionmentioning

confidence: 99%

Disruption of the phosphate-starvation response of oilseed rape suspension cells by the fungicide phosphonate

Carswell

Grant

Plaxton

1997

Planta

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The influence of the anti-fungal agent phosphonate (Phi) on the response of oilseed rape (Brassica napus L. cv. Jet Neuf) cell suspensions to inorganic phosphate (Pi) starvation was examined. Subculture of the cells for 7 d in the absence of Pi increased acid phosphate (APase; EC 3.1.3.2) and pyrophosphate (PPi)-dependent phosphofructokinase (PFP; EC 2.7.1.90) activities by 4.5- and 2.8-fold, respectively, and led to a 19-fold increase in Vmax and a 14-fold decrease in Km (Pi) and Pi uptake. Addition of 2 mM Pi to the nutrient media caused dramatic reductions in the growth and Pi content of the Pi-starved, but not Pi-sufficient cells, and largely abolished the Pi-starvation-dependent induction of PFP, APase, and the high-affinity plasmalemma Pi translocator. Immunoblotting indicated the cells contain three APase isoforms that are synthesized de novo following Pi stress, and that Pi treatment represses this process. Phosphonate treatment of Pi-starved cells significantly altered the relative extent of in-vivo 32P-labelling of polypeptides having M(rs) of 66, 55, 45 and 40 kDa. However, Phi had no effect on the total adenylate pool of Pi-starved cells which was about 32% lower than that of Pi-sufficient cells by day 7. Soluble protein levels, and activities of pyruvate kinase (EC 2.7.1.40) and ATP-dependent phosphofructokinase (EC 2.7.1.11) were unaffected by Pi starvation and/or Phi treatment. The effects of Phi on the growth, and APase and PFP activities of Pi-starved B. napus seedlings were similar to those observed in the suspension cells. The results re consistent with the hypothesis that a primary site of Phi action in higher plants is at the level of the signal transduction chain by which plants perceive and respond to Pi stress at the molecular level.

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The control of Phytophthora root rot of avocado with fungicides and the effect of this disease on water relations, yield and ring neck.

Cited by 19 publications

References 8 publications

Post-harvest diseases of avocado fruits in New Zealand

Post-harvest diseases of avocado fruits in New Zealand

Strategies of attack and defence in woody plant–Phytophthora interactions

Disruption of the phosphate-starvation response of oilseed rape suspension cells by the fungicide phosphonate

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