Higher Potassium Concentration in Shoots Reduces Gray Mold in Sweet Basil

Yermiyahu, Uri; Israeli, Lior; David, Dalia Rav; Faingold, Inna; Elad, Y.

doi:10.1094/phyto-09-14-0256-r

Cited by 16 publications

(16 citation statements)

References 34 publications

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“…The leaf K increased with 131 mg l -1 of K2O (61 mg l -1 of K, SM), reaching a similar value to the reference value (36.5 mg g -1 ). A high K content in tissues is desirable because its relationship with an improvement in plant quality is well established [Lester et al 2010] and with the increase of resistance to diseases and abiotic [Yermiyahu et al 2015]. The SL produced a leaf K content below the reference value, although no sign of K deficiency was observed.…”

Section: Discussionmentioning

confidence: 99%

GROWING THE ENDANGERED SPECIES Astragalus nitidiflorus IN THE NURSERY: FERTILIZATION RATE AFFECTS GROWTH, AND LEAF NUTRIENT AND CHLOROPHYLL CONTENTS

Vicente¹,

Martínez-Sánchez²,

Franco³

et al. 2018

Acta Sci.Pol.Hortorum Cultus

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Astragalus nitidiflorus is an endangered legume endemic to the southeast of the Iberian Peninsula. This species develops symbiotic relationships with N-fixing bacteria. However, the problem of isolating its rhizobia has not been solved. Because poor N fixation in plants can be corrected by fertilization, the effect of N-P-K fertilizers on growth, leaf chlorophyll and mineral ions was studied. Plants of A. nitidiflorus were grown in 100%-substrate with different N-P-K fertilizer rates (mg l-1): 1-1-8 (S0), 69-29-35 (SL), 144-43-131 (SM) and 245-58-235 (SH). A treatment with substrate plus soil from the natural habitat and no fertilizers (T0) was included. The reference foliar contents of N, P and K were 42.5, 3.5 and 36.5 mg g-1 , respectively. Although the species did not form root nodules when grown in substrate, T0 plants produced active nodules that allowed the plants to grow properly without fertilization. In the absence of nodules, both N fertilization (~144 mg l-1) and Fe fertilization (>12 mg l-1) are vital, as is, to a lesser extent, K fertilization (~75 mg l-1 K2O). The S0 and SL reduced leaf chlorophyll, while SM prevented its degradation.

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Section: Discussionmentioning

confidence: 99%

GROWING THE ENDANGERED SPECIES Astragalus nitidiflorus IN THE NURSERY: FERTILIZATION RATE AFFECTS GROWTH, AND LEAF NUTRIENT AND CHLOROPHYLL CONTENTS

Vicente¹,

Martínez-Sánchez²,

Franco³

et al. 2018

Acta Sci.Pol.Hortorum Cultus

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“…The ‘Peri’ cultivar is known to be susceptible to Peronospora belbahrii [ 24 ]. Plugs of sweet basil seedlings were used, each containing three to five plants; hereafter, one plug is referred to as a “plant” as is common practice [ 41 ]. The experiments involving potted plants were performed in an experimental greenhouse at the Volcani Institute, Rishon LeZion, Israel (Site A).…”

Section: Methodsmentioning

confidence: 99%

Effects of Microelements on Downy Mildew (Peronospora belbahrii) of Sweet Basil

Elad

Nisan

Kleinman³

et al. 2021

Plants

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We recently demonstrated that spraying or irrigating with Ca, Mg and K reduces the severity of sweet basil downy mildew (SBDM). Here, the effects of Mn, Zn, Cu and Fe on SBDM were tested in potted plants. The effects of Mn and Zn were also tested under semi-commercial and commercial-like field conditions. Spray applications of a mixture of EDTA-chelated microelements (i.e., Fe-EDTA, Mn-EDTA, Zn-EDTA, Cu-EDTA and Mo) reduces SBDM severity. The application of EDTA chelates of individual microelements (i.e., Fe-EDTA, Mn-EDTA and Zn-EDTA) significantly reduces SBDM in potted plants. Foliar applications of Mn-EDTA and Zn-EDTA are found to be effective under semi-commercial conditions and were, thus, further tested under commercial-like conditions. Under commercial-like conditions, foliar-applied Mn-EDTA and Zn-EDTA decreased SBDM severity by 46–71%. When applied through the irrigation solution, those two microelements reduce SBDM by more than 50%. Combining Mg with Mn-EDTA and Zn-EDTA in the irrigation solution does not provide any additional disease reduction. In the commercial-like field experiment, the microelement-mixture treatment, applied as a spray or via the irrigation solution, was combined with fungicides spray treatments. This combination provides synergistic disease control. The mode of action in this plant–pathogen system may involve features of altered host resistance.

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“…Rust and downy mildew of cereals increased when high levels of NO 3 − were applied as fertilizer [ 15 ]. In sweet basil, the necrotrophs Botrytis cinerea and Sclerotinia sclerotiorum are more prevalent when there are higher concentrations of N in the plant shoots [ 16 , 17 ]. Increasing the total N concentration in the irrigation solution was shown to increase the level of sweet basil downy mildew in potted sweet basil plants as well as sweet basil grown under field conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Potassium at optimal tissue concentrations decreases the susceptibility of plants to disease [ 9 ]. K reduced the incidence of disease caused by the ascomycete pathogens B. cinerea and S. sclerotiorum [ 16 , 17 ]. K also suppressed downy mildew ( Peronospora plantaginis ) severity in Plantago ovata , the plant used to produce isabgol [ 26 ], and suppresses sweet basil downy mildew when it is sprayed on the plant [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

“…Ca increases the resistance of plants to pathogens such as species of Pythium , Sclerotinia , Botrytis , and Fusarium [ 9 ]. Ca reduced in sweet basil the incidence of B. cinerea and S. sclerotiorum [ 16 , 17 ]. Sprayed applications of Ca reduced the severity of downy mildew ( Sclerospora graminicola ) in pearl millet ( Pennisetum glaucum ) [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Nutrient Status of Cucumber Plants Affects Powdery Mildew (Podosphaera xanthii)

Elad

Barnea

Rav‐David

et al. 2021

Plants

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We examined the effects of applications of N, P, K, Mg, and Ca through an irrigation solution and spraying K, Ca, and Mg salts on cucumber powdery mildew (CPM, Podosphaera xanthii) in potted plants and under commercial-like conditions. Spraying CaCl2 and MgCl2, or KCl and K2SO4, decreased CPM. There were significant negative correlations between the anion-related molar concentrations of the salts and disease severity. Among the sprayed treatments, NaCl provided significantly less CPM control when applied at a low (0.05 M) concentration, as compared with CaCl2 and MgCl2. When sprayed applications of Mg and K salts were analyzed separately from the untreated control, the Cl− salts were found to be more effective than the SO4−2 salts. High N and Mg concentrations in the irrigation water delivered to young, fruit-less cucumber plants reduced CPM, whereas more CPM was observed when the irrigation solution contained a medium amount of P and a high amount of K. In contrast, mature, fruit-bearing plants had less severe CPM at higher N, lower P, and higher K levels. Spraying mature plants with monopotassium phosphate, polyhalite (K2Ca2Mg(SO4)4·2H2O), and the salts mentioned above over an entire growing season suppressed CPM. CPM severity was also reduced by spray applications of Ca, Mg, and KSO4−2 and Cl− salts. Spray applications provided better CPM control than fertigation treatments. Induced resistance is probably involved in the effects of nutrients on CPM.

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Higher Potassium Concentration in Shoots Reduces Gray Mold in Sweet Basil

Cited by 16 publications

References 34 publications

GROWING THE ENDANGERED SPECIES Astragalus nitidiflorus IN THE NURSERY: FERTILIZATION RATE AFFECTS GROWTH, AND LEAF NUTRIENT AND CHLOROPHYLL CONTENTS

GROWING THE ENDANGERED SPECIES Astragalus nitidiflorus IN THE NURSERY: FERTILIZATION RATE AFFECTS GROWTH, AND LEAF NUTRIENT AND CHLOROPHYLL CONTENTS

Effects of Microelements on Downy Mildew (Peronospora belbahrii) of Sweet Basil

Nutrient Status of Cucumber Plants Affects Powdery Mildew (Podosphaera xanthii)

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