An Introduction to Crop Physiology

Milthorpe, F. L.; Moorby, J.

doi:10.1097/00010694-197506000-00019

Cited by 63 publications

(59 citation statements)

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“…The shoot N concentrations of plants grown in the main experiment were between 0n8-1n7 % d. wt. Shoot N concentrations in young, herbaceous plants grown in N-rich nutrient solutions or well fertilized soil are generally 3 % (Milthorpe & Moorby, 1979), but can be 1 % in the field (Thompson et al, 1997) ; figures around 2 % are common. The soil : sand medium that we used was not therefore N-rich, and we would have expected morphological and physiological responses to occur to improve N capture from relatively N-rich patches.…”

Section: mentioning

confidence: 99%

Root proliferation, soil fauna and plant nitrogen capture from nutrient‐rich patches in soil

Hodge

Stewart²,

Robinson³

et al. 1998

New Phytologist

141

135

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We investigated interactions between plant roots, protozoa and nematodes after addition of patches containing inorganic or organic nitrogen in order to determine whether root proliferation could explain the capture of N by the plant from the patch. Decomposition of a "&N\"$C, dual-labelled, organic patch in the absence of plant roots was also examined. In the decomposing patch the amounts of "$C and "&N remaining co-varied and both declined with time. Nematode numbers increased. However, protozoan biomass and inorganic N (NO $ − and NH % + ) availability did not significantly alter as decomposition of the patch progressed. Addition of inorganic N patches, as NH % NO $ solutions, to the first lateral to emerge from the main seminal root axis of Lolium perenne L. seedlings had no effect on root growth compared with controls 16 d after addition. Protozoan biomass increased. Furthermore, log protozoan biomass and NO $ − concentrations of the growth medium were significantly (P 0n05) and positively related. Plant response (i.e. biomass production, N capture and root length) to an added organic patch was examined using five different grass species (Festuca arundinacea L., Phleum pratense L., Poa pratensis L., Dactylis glomerata L. and L. perenne). Total plant biomass was significantly (P 0n05) repressed by an organic patch. Plant N content was reduced when an organic patch was present but N concentrations were greater. Roots were generally slow to proliferate within the patch but there was a significant (P 0n05) speciesipatch interaction for root length within the patch at harvest and in the 2-cm band below it. However, "&N capture by the plants was not related to mean root length duration. All species captured similar amounts of "&N (c. 3-5 %) at harvest as a percentage of the initial "&N added in the organic patch. Similarly, the percentage of the total N captured from the patch was not related to the proportion of the root weight within the patch. The fraction of the captured N from the organic patch as a percentage of the plants' total N, however, did differ among species. Substantial amounts ( 62 %) of the "&N initially added remained in the patch at harvest. Much less (c. 13-21 %) "$C remained in the patch. Protozoan biomass and nematode numbers increased significantly (P 0n05) in the organic patch, although the relationship between the two groups was not significant. As in the inorganic N study, the relationship between log protozoan biomass and NO $ − concentrations in the soil was significantly positive. We conclude that, when grown in monoculture, plants' N capture from an organic patch is not a simple function of root proliferation. External factors, not plant attributes, are more important in controlling patch exploitation.

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Section: mentioning

confidence: 99%

Root proliferation, soil fauna and plant nitrogen capture from nutrient‐rich patches in soil

Hodge

Stewart²,

Robinson³

et al. 1998

New Phytologist

141

135

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“…For example, inhibition of the Proton PumP 01 potassium channels transiently inhibits growth (Lew, 1991), and calcium currents inward at the hair tip are associated with actively growing root hairs (Schiefelbein et al, 1992). I find that the electrical properties of the cells are Water relations are a key determinant of growth and development in plants (Milthorpe and Moorby, 1974;Kramer, 1983). Water movement through higher plant cells is one of the steps in its transport throughout the plant (Passioura, 1988), and net water movement into the cells, partly due to ion accumulation inside the cell, creates an internal hydrostatic pressure (turgor) that is a driving force for cell growth by expansion (Cosgrove, 1986).…”

mentioning

confidence: 99%

Pressure Regulation of the Electrical Properties of Growing Arabidopsis thaliana L. Root Hairs

Lew

1996

Plant Physiology

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“…Falcão (2012), estudiando la producción de plántulas Parapiptadenia rigida en diferentes sustratos y láminas de riego, encontró el mayor porcentaje de masa seca de la hoja cuando aplicó la menor cantidad de agua. Dichos resultados se asemejan a los de la presente investigación.…”

Section: Masa Seca De Hojas (Msh)unclassified

“…Martinelli (2012), evaluando la calidad morfológica en plántulas de Peltophorum dubium bajo diferentes manejos de agua, encontró el mayor valor de masa seca de raíz en la menor lámina de riego aplicada. También reportó que la menor lámina de riego presentó el mayor porcentaje de plantas con un sistema radicular de mejor calidad para ir a campo, unos resultados que se asemejan a los de la presente investigación.…”

Section: Masa Seca De La Raíz (Msr)unclassified

“…Mithorphe & Moorby (1982) afirman que la TAC está en función de la cantidad de material de crecimiento presente y de la tasa de crecimiento per se, motivo por el cual, al inicio del desarrollo existe un periodo en que esta función del crecimiento es cada vez mayor, posteriormente se mantiene casi constante y luego comienza a disminuir. La tasa relativa de crecimiento (TRC), según Hunt (1982) y Gardner et al (1990, representa la eficiencia de la planta para producir nuevo material en un tiempo determinado expresado en grados de materia seca ganados por gramo de materia seca existente por unidad de tiempo (g•g -1 •dia -1 ).…”

Section: /10unclassified

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Requerimiento Hídrico de Gmelina arborea en Etapa de Vivero Bajo Condiciones Controladas

et al. 2017

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RESUMENCon el fin de conocer el requerimiento hídrico de Melina en la etapa de vivero, se realizó un ensayo con cuatro coeficientes de consumo (Kc: 0,6, 0,8, 1,2, 1,4. Estos tratamientos se transformaron en láminas de riego de 2,4 mm.día -1 , 3,2 mm.día -1 , 4,8 mm.día -1 y 5,6 mm.día -1 respectivamente, debido a que la evapotranspiración de referencia (ETO) de la zona fue de 4 mm.día -1 . Se observó que a medida que se aumentaba la lámina de riego, disminuía el crecimiento de las plantas. Los valores más altos de altura de planta, área foliar, masa seca de hoja, masa seca del tallo y masa seca de raíz se obtuvieron con la lámina de 2,4 mm.día -1 . Por otro lado, los índices de crecimiento (TAC, TRC, AFE, RAF) muestran la misma tendencia. Con base en estos resultados se determinó que el Kc para esta especie en la etapa de vivero es de 0,6.Palabras clave: láminas de riego, coeficiente de cultivo (Kc), crecimiento. Water Requirement of Gmelina arborea on Nursery StageUnder Controlled Conditions ABSTRACTIn order to recognize the Melina water requirement in the nursery stage, we performed a test with four crop coefficient (Kc: 0,6, 0,8, 1,2, 1,4). These treatments included irrigation blades of 2,4 mm.day -1 , 3,2 mm.day -1 , 4,8 mm.day -1 and 5.6 mm.day -1 respectively, due to the area reference evapotranspiration at 4mm.day -1 . It was observed a decrease of plant growth as the raising of the irrigation blade. The highest values of plant height, leaf area, leaf dry weight, dry weight of stem and root dry weight were obtained with the blade of 2,4 mm.day -1 . On the other hand, the growth rates studied have shown the same trend. Based on these results we determined that the Kc for this species in the pond stage is 0,6.

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An Introduction to Crop Physiology

Cited by 63 publications

References 0 publications

Root proliferation, soil fauna and plant nitrogen capture from nutrient‐rich patches in soil

Root proliferation, soil fauna and plant nitrogen capture from nutrient‐rich patches in soil

Pressure Regulation of the Electrical Properties of Growing Arabidopsis thaliana L. Root Hairs

Requerimiento Hídrico de Gmelina arborea en Etapa de Vivero Bajo Condiciones Controladas

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