Response of capsicum (Capsicum annuum L.), sweet corn (Zea mays L.), and tomato (Lycopersicon esculentum Mill.) to inoculation with vesicular-arbuscular mycorrhizae

This greenhouse study investigated the effects of the addition of vesicular-arbuscular mycorrhizal (VAM) inoculum (Glomus mosseae [Nicol. & Gerd.] Gerdemann & Trappe and Glomus etunicatum Becker & Gerdemann) on capsicum (Capsicum annuum L. cv. Target), sweet corn (Zea mays L. cv. Snosweet), and tomato (Lycopersicon esculentum Mill. cv. Floradade) grown in a low P sandy loam (6 mg NaHCO3-extractable P/kg) with 5 rates of P (0, 10.3, 30.9, 92.7, or 278 mg P/kg oven-dry soil; P1, P2, P3, P4, or P5, respectively) and 2 rates of N (50 or 200 mg N/L in irrigation solution; N1 or N2, respectively). The growth periods (from sowing to harvest) for the 3 crops were as follows: 27 August-22 November 1993 for capsicum, 26 August-29 October 1993 for sweet corn, 31 August-22 October 1993 for tomato. For VAM-inoculated capsicum at PI, the dry weight (10.03 g/plant) and mean P concentration in the 5 youngest mature leaves (0.14%) were greater (P < 0.05) than those for uninoculated plants (0.28 g/plant; 0.09% P); a high coefficient of variation necessitated the use of log, transformed data to show differences. At low P rates, dry weight of sweet corn (P1, P2) and tomato (P1) plants colonised with VAM did not differ (P > 0.05) from uncolonised plants, despite inoculated plants having higher P concentrations in index tissues. At intermediate P rates, dry weights of inoculated plants were lower (P < 0.05) than those of uninoculated plants of sweet corn at P3 (81.1 and 102.2 g/plant, respectively) and of tomato at both P2 (11.7 and 34.5 g/plant, respectively) and P3 (39.6 and 52.1 g/plant, respectively). For all 3 crops, a lack of VAM response at high P ( >P4) was related to a lower (P < 0.05) VAM colonisation. The percentage root length colonised by VAM at P5 was only 6.8, 19.6, and 2.4% of that measured at P1 in the case of capsicum, sweet corn, and tomato roots, respectively. Increasing N concentration in the irrigation solution from 50 to 200 mg/L increased (P < 0.05) VAM colonisation of sweet corn (from 28 8 to 36 2%), but had no effect on capsicum and tomato.

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Effects of mycorrhizae, established from an existing intact hyphal network, on the growth response of capsicum (Capsicum annuum L.) and tomato (Lycopersicon esculentum Mill.) to five rates of applied phosphorus

Australian Journal of Agricultural Research ◽

10.1071/a97167 ◽

1999 ◽

Vol 50 (2) ◽

pp. 223 ◽

Cited By ~ 17

Author(s):

J. K. Olsen ◽

J. T. Schaefer ◽

D. G. Edwards ◽

M. N. Hunter ◽

V. J. Galea ◽

...

Keyword(s):

Lycopersicon Esculentum ◽

Capsicum Annuum ◽

Growth Medium ◽

Growth Response ◽

Dry Weight ◽

Vegetable Crops ◽

Low Light ◽

Growth Depression ◽

Capsicum Annuum L ◽

Lycopersicon Esculentum Mill

The growth response of 2 vegetable crops to 5 rates of applied phosphorus (P)in the presence or absence of an existing network of extraradical mycorrhizalmycelium was determined in 2 greenhouse pot experiments (Expt 1, autumnwinter; Expt 2, summer autumn) using a low-P growth medium (6 or 5 mgNaHCO3-extractable P/kg for Expt 1 or 2,respectively). In both experiments, capsicum(Capsicum annuum L.) and tomato(Lycopersicon esculentum Mill.) plants were grown at 0(P1 ), 9.2 (P2), 27.5(P3 ), 82.5 (P4 ), or 248(P5) mg P/kg oven-dry soil (spot-placed at sowing)within a nylon mesh (pore size 44 µm). The mesh excluded roots from theoriginal sunflower (Helianthus annuus L.) host plants,to which either live (VAM+) or killed (VAM–) mycorrhizal[Glomus etunicatum Becker & Gerdemann andGlomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe] inoculum was added at sowing. The mesh did allow fungal hyphae togrow into the growth medium contained by the mesh.Whereas VAM+ plants generally had higher P concentrations in indextissues than VAM– plants at low P rates, a concomitant increase in drymatter yield was restricted to the P1 rate. AtP1 in Expt 2, the increase in the dry weight of wholeplants as a result of VAM colonisation was as large as 91.7-fold and 17.9-foldfor capsicum and tomato, respectively. Root starch analysis indicated that thelower dry matter yields of VAM+ plants than of VAM– plants at≥P2 could be attributed to insufficient photosynthateproduction by VAM+ plants to meet the carbon (C) demand of both host andendophytes within the relatively low-light environment of the greenhouse(average daily solar irradiance of 8.4 MJ/m2 forExpt 1 and 13.4 MJ/m2 for Expt 2).The growth response of vegetable crops grown within the greenhouse fromcolonisation by an established mycorrhizal mycelium appears to depend on acritical balance of P and C supply; i.e. at P1, P wasmore limiting than C, and the increased uptake of P as a result ofcolonisation of plant roots by VAM resulted in a growth response. At higher Prates, C was more limiting than P due to low light in the greenhouse, and theadditional demand for photosynthate imposed by the endophytes on the hostresulted in a growth depression relative to non-mycorrhizal plants.

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Intercropping with sweet corn (Zea mays L. var. rugosa Bonaf.) expands P acquisition channels of chili pepper (Capsicum annuum L.) via arbuscular mycorrhizal hyphal networks

Journal of Soils and Sediments ◽

10.1007/s11368-018-2198-6 ◽

2018 ◽

Vol 19 (4) ◽

pp. 1632-1639 ◽

Cited By ~ 3

Author(s):

Junli Hu ◽

Minghui Li ◽

Homgmin Liu ◽

Qi Zhao ◽

Xiangui Lin

Keyword(s):

Zea Mays ◽

Capsicum Annuum ◽

Zea Mays L ◽

Sweet Corn ◽

Arbuscular Mycorrhizal ◽

Chili Pepper ◽

Capsicum Annuum L ◽

P Acquisition

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Effect of salt stress on some sweet corn (Zea mays L. var. saccharata) genotypes

Archives of Biological Sciences ◽

10.2298/abs150121062s ◽

2015 ◽

Vol 67 (3) ◽

pp. 993-1000 ◽

Cited By ~ 3

Author(s):

Lydia Shtereva ◽

Roumiana Vassilevska-Ivanova ◽

Tanya Karceva

Keyword(s):

Zea Mays ◽

Salt Stress ◽

Zea Mays L ◽

Sweet Corn ◽

Growth Parameters ◽

Dry Weight ◽

Germination Percentage ◽

F1 Hybrid ◽

Salt Stress Condition ◽

Salinity Levels

An experiment was carried out hydroponically under laboratory conditions to investigate the effect of salt stress on several physiological and biochemical parameters of three sweet corn (Zea mays L. var. saccharata) genotypes: lines 6-13, C-6 (pollen source) and their heterotic F1 hybrid ?Zaharina?. The degree of salinity tolerance among these genotypes was evaluated at three different sodium chloride (NaCl) concentrations: 0 mM, 100 mM, 125 mM and 150 mM. Seed germination, plant growth and biochemical stress determining parameters such as malondialdehyde (MDA), proline content and hydrogen peroxide (H2O2) levels were compared between seedlings of lines and hybrid. The obtained results indicated that both lines and hybrid have similar responses at different salinity levels for all examined traits. All the seedlings? growth parameters, such as germination percentage, root length, shoot length, root and shoot fresh and dry weight, decreased with increasing salinity level. MDA, proline and H2O2 increased at different saline conditions in comparison to the control. Based on the results, of the three genotypes examined, the hybrid Zaharina, followed by line C-6, was more salt-sensitive than line 6-13 in salt stress condition.

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Estudo microscópico de páprica (Capsicum annuum L.): detecção de fraudes e matérias estranhas

10.22239/2317-269x.01431 ◽

2021 ◽

Vol 9 (1) ◽

pp. 123-128

Author(s):

Laís Fernanda de Pauli-Yamada ◽

◽

Cinthia Iara de Aquino ◽

Augusta Mendes da Silva ◽

Maria Aparecida Moraes Marciano ◽

...

Keyword(s):

Zea Mays ◽

Capsicum Annuum ◽

Zea Mays L ◽

Sao Paulo ◽

São Paulo ◽

Bixa Orellana ◽

Capsicum Annuum L

Introdução: A páprica (Capsicum annuum L.) é um condimento utilizado mundialmente, produzido a partir de diversas variedades de pimentão maduro, seco e moído e está sujeita a adulterações e fraudes, além de contaminações decorrentes de falhas nas boas práticasde produção, armazenamento ou na comercialização. Objetivo: Avaliar a autenticidade e a presença de matérias estranhas em pápricas comercializadas no estado de São Paulo, assim como verificar a sua conformidade em relação à legislação nos parâmetros microscópicos. Método: Foram analisadas 43 amostras de páprica para verificação da autenticidade e para a pesquisa de matérias estranhas, utilizando método preconizado nos Métodos Oficiais da Association of Official Analytical Collaboration International. Resultados: A avaliação da autenticidade evidenciou fraude em 30,0% das amostras. O ingrediente adicionado com maior frequência foi o amido de Zea mays L. (milho), acompanhado principalmente de Bixa orellana L. (urucum). Entre as matérias estranhas detectadas, os fragmentos de pelo de roedor e os fragmentos de insetos foram os mais frequentes, presentes em 91,0% e 79,0% das amostras, respectivamente. As amostras puras apresentaram maior quantidade de fragmentos de pelo de roedor, enquanto as amostras adulteradas, maior quantidade de fragmentos de insetos. Em relação à legislação sanitária, 88,0% das amostras foram consideradas insatisfatórias, destas, 30,0% por estarem adulteradas e 77,0% por apresentarem quantidade de matérias estranhas acima do limite tolerado. Conclusões: Os resultados deste trabalho revelaram fraude e falhas nas boas práticas na cadeia produtiva da páprica, ressaltando a necessidade de intensificação da vigilância desse tipo de produto com vistas à garantia de sua oferta à população de forma fidedigna e segura.

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ÓLEO ESSENCIAL DE ERVA-CIDREIRA SOBRE FITOPATÓGENOS DE ESPÉCIES FLORESTAIS E AGRÍCOLAS

Revista Agroecossistemas ◽

10.18542/ragros.v10i1.5212 ◽

2018 ◽

Vol 10 (1) ◽

pp. 206

Author(s):

Bruna Cristine Martins de Sousa ◽

Santana Pinto de Castro ◽

Katiane Araújo Lourido ◽

David Chiara ◽

Kelly Christina Ferreira Castro ◽

...

Keyword(s):

Zea Mays ◽

Glycine Max ◽

Rhizoctonia Solani ◽

Capsicum Annuum ◽

Zea Mays L ◽

Fusarium Spp ◽

Capsicum Annuum L ◽

Lippia Alba ◽

Glycine Max L

Pertencente à família Verbenaceae, Lippia alba (Mill) N. E. Brown é amplamente utilizada na medicina popular devido suas propriedades analgésicas, calmantes e espasmolíticas. Neste trabalho, buscou-se avaliar o efeito do óleo essencial dessa espécie sobre o crescimento micelial de isolados de Fusarium spp. obtidos de Anacardium occidentale L. (caju); Zea mays L. (milho); Capsicum annuum L. (pimentão); Couratari oblongifolia Ducke & R. Knuth (tauari) e Rhizoctonia solani obtido da espécie Glycine max L. (soja). No bioensaio, o óleo previamente filtrado foi adicionado em meio BDA (Batata-Dextrose-Ágar), homogeneizado e vertido em placas de Petri. Em seguida, discos contendo estruturas fúngicas foram depositados, centralmente, nas placas com BDA e o óleo em suas respectivas concentrações. O tratamento controle consistiu em placas com meio de cultura sem a presença do óleo. Os dados foram obtidos medindo o diâmetro das colônias fúngicas, durante cinco dias. Todas as concentrações reduziram o crescimento micelial dos fitopatógenos em relação à testemunha, apresentando um percentual de inibição médio de 88,5%. Para os isolados de Fusarium spp. do caju e do pimentão, bem como Rhizoctonia solani isolado da soja, o óleo apresentou efeito fungicida; sugerindo estudos, in vivo, para constatação de seu efeito fungitóxico, e análises químicas para investigação e isolamento dos compostos ativos da espécie.PALAVRAS-CHAVE: Controle alternativo, Efeito fungicida, Redução do crescimento.

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SOWING AND PLANTING PERIOD ON YIELD AND EAR QUALITY OF SWEET CORN (Zea mays L. var. saccharata)

Ciência e Agrotecnologia ◽

10.1590/s1413-70542015000100006 ◽

2015 ◽

Vol 39 (1) ◽

pp. 48-57

Author(s):

Atnan Ugur ◽

Hande Ayhan Maden

Keyword(s):

Zea Mays ◽

Environmental Factors ◽

Zea Mays L ◽

Sweet Corn ◽

Dry Weight ◽

Yield And Quality ◽

Cultivation Period ◽

Resistant Varieties ◽

Quality Features

Sweet corn (Zea mays L. var. saccharata) attracts people with its amazing flavour. Adverse environmental factors decrease plant's cob yield and quality. A more effective production can be made by using resistant varieties and adjusting the sowing and plating periods. In this study, the effect of direct seed sowing and cultivating with seedlings in three different times (5, 15 and 25 May) on the sweet corn's cob yield and certain quality features have been investigated. In the research hybrid sweet corn varieties; 2201, Challenger, Merit, Sunshine and Yellow Baby were used. Ear weight, ear yield, ear length, ear diameter, sequence in ear, kernel numbers in the sequence, dry weight, TSS, chroma and hue values have been identified in the study. The values obtained from cultivation with seedling have been found higher in all of the parameters except for TSS. With the progress of cultivation period while TSS and hue values in kernels have increased (9.72 to 20.94) chroma values have decreased. Husked ear weight values have changed between 184.69 to 224.11 g in varieties. The highest ear yield (3594.33 kg da-1) has been obtained from Merit by seedling planting cultivation on 15 May.

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