Sensitivity of root and leaf water status in maize (Zea mays) subjected to mild soil dryness

Schmidhalter, Urs; Burucs, Z.; Camp, Karl-Heinz

doi:10.1071/pp97047

Cited by 19 publications

(14 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enhanced root growth may be able to explore and absorb more water and nutrients from the soil [8,24,46]. The lower shoot DW with N, NP and NPK fertilization may be due to an increase in assimilate allocation to roots for maintaining root growth, for osmotic adjustment and for turgor maintenance [10,25,26]. Similar results were reported by other authors [21,47,48].…”

Section: Discussionsupporting

confidence: 80%

“…Consequently, the root/shoot ratios were significantly increased with N, NP, PK and NPK supply under drought conditions compared with well-watered conditions (Figure 7). Possibly, with the development of less soil moisture, plants respond to drought by increasing root biomass or a root absorptive surface relative to the shoot biomass [25,26,30]. The enhanced root growth may be able to explore and absorb more water and nutrients from the soil [8,24,46].…”

Section: Discussionmentioning

confidence: 99%

“…At the seedling growth stage, drought stress might result in higher root dry weights and longer roots and/or reduced shoot growth [1,[24][25][26][43][44][45]. Although our study did not show a significant increase in root DW or a significant decrease in shoot DW under drought stress for all nutrient treatments, the results in Figures 4 and 6 demonstrated that there was a tendency of higher root DW for all nutrient treatments except for NK fertilization at day 20 after sowing and of lower shoot DW for single N and combined NP and NPK under drought than under well-watered conditions.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings

Studer

Schmidhalter

2017

Agriculture

View full text Add to dashboard Cite

Abstract:Global climate change is likely to increase the risk of frequent drought. Maize, as the principal global cereal, is particularly impacted by drought. Nutrient supply may improve plant drought tolerance for better plant establishment during seedling growth stages. Thus, this study investigated the interactive effects of drought and the application of the nutrients N, P and K either individually or in combination. The maize seedlings were harvested between 12 and 20 days after sowing, and the leaf area, shoot fresh and dry weight and root dry weight were determined, and shoot water content and root/shoot dry weight ratio were calculated. Among the N, P and K fertilization treatments applied individually or in combination, the results showed that there was generally a positive effect of combined NPK and/or NP nutrient supply on shoot growth such as leaf area, shoot fresh and dry weight at day 20 after sowing under both well-watered and drought conditions compared with no nutrient supply. Compared with the effect of N and P nutrient supply, it seems that K was not limiting to plant growth due to the mineralogical characteristics of the illitic-chloritic silt loam used, which provided sufficient K, even though soil tests showed a low K nutrient status. Interestingly, the root/shoot ratio remained high and constant under drought regardless of NPK application, while it decreased with NPK applications in the well-watered treatment. This suggests that the higher root/shoot ratios with N, NP, PK and NPK under drought could be exploited as a strategy for stress tolerance in crop plants.

show abstract

Section: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings

Studer

Schmidhalter

2017

Agriculture

View full text Add to dashboard Cite

show abstract

“…3B and 3C). In fact, the soilplant water potential unbalance just before sunrise is quite common and has been mentioned in several studies (Sellin, 1996;Schmidhalter, 1997;Schmidhalter et al, 1998).…”

Section: ѱX As Water Stress Indicator For Pistachiomentioning

confidence: 99%

Impacts of water stress, environment and rootstock on the diurnal behaviour of stem water potential and leaf conductance in pistachio (Pistacia vera L.)

Memmi

Couceiro

Gijón

et al. 2016

Span. j. agric. res.

View full text Add to dashboard Cite

change in the type of orchard management, with the aim of increasing yield mainly by transforming pistachio from a traditionally rainfed cultivated crop to an irrigated crop. However, the negative balance between water needs and its availability has provoked the claim of deficit irrigation strategies to maximize the rate of returns in front of water availability. Consequently, precision in irrigation has taken another level and the recourse to the study of the different mechanisms connecting the tree water relations to water deficit strate- RESEARCH ARTICLE OPEN ACCESS AbstractLittle information is available on the diurnal behaviour of water potential and leaf conductance on pistachio trees despite their relevance to fine tune irrigation strategies. Mature pistachio trees were subject to simultaneous measurements of stem water potential (Ψ x ) and leaf conductance (g l ) during the day, at three important periods of the irrigation season. Trees were grown on three different rootstocks and water regimes. An initial baseline relating Ψ x to air vapor pressure deficit (VPD) is presented for irrigation scheduling in pistachio. Ψ x was closely correlated with VPD but with a different fit according to the degree of water stress. No evidence of the variation of Ψ x in relation to the phenology of the tree was observed. Furthermore, midday Ψ x showed more accuracy to indicate a situation of water stress than predawn water potential. Under well irrigated conditions, g l was positively correlated with VPD during stage II of growth reaching its peak when VPD reached its maximum value (around 4 kPa). This behaviour changed during stage III of fruit growth suggesting a reliance of stomatal behaviour to the phenological stage independently to the tree water status. The levels of water stress reached were translated in a slow recovery of tree water status and leaf conductance (more than 40 days). Regarding rootstocks, P. integerrima showed little adaptation to water shortage compared to the two other rootstocks under the studied conditions. Additional key words: diurnal pattern; Pistacia atlantica; Pistacia integerrima; Pistacia terebinthus; water stress recovery. Abbreviations used: ETa (actual crop evapotranspiration, in mm); ETc (potential crop evapotranspiration, in mm); ETo (reference evapotranspiration, in mm); Kc (crop coefficient); Kr (reduction coefficient); PA (Pistacia atlantica Desf.); PI (Pistacia integerrima L.); PT (Pistacia terebinthus L.); RDI (regulated deficit irrigation); VPD (air vapor pressure deficit, in kPa); Ψ x (stem water potential, in MPa);g l (leaf conductance, in mmol/m 2 ·s).

show abstract

“…In this study, measurement of Ѱ s before dawn had showed its limitation even when statistical water stress differences were detected between treatments from the fact that it was not representative of a steady state; the maximum of Ѱ s did not take place only at predawn but a few hours later, when trees were in a rehydration process from stage II to stage III (Figures 4.7B and 4.7C). In fact, the soilplant water potential unbalance just before sunrise is quite common and has been mentioned in several studies (Sellin, 1996;Schmidhalter, 1997;Schmidhalter et al, 1998).…”

Section: ѱ S As Water Stress Indicator For Pistachiomentioning

confidence: 99%

Improvement of regulated deficit irrigation in pistachio (Pistacia vera L.) : water relations and rootstocks influence

Memmi¹

View full text Add to dashboard Cite

Madrid 2016Esta tesis se presenta como compendio de publicaciones. Se han editado los articulos originales para establecer una mayor coherencia formal a lo largo del trabajo. Water stress thresholds for regulated deficit irrigation in pistachio trees: Rootstock influence and effects on yield quality.Memmi, H., Gijón, M.C., Couceiro, J.F., Pérez-López, D. (2016). Agricultural Water Management. Impacts of water stress, environment and rootstock on the diurnal behaviour of stem water potential and leaf conductance in pistachio (Pistacia vera L.).Memmi, H., Couceiro, J.F., Gijón, M.C., Pérez-López, D. (2016 RESUMENEl objetivo general de esta tesis doctoral fue optimizar la gestión del riego en el pistachero en base a la aplicación de estrategias de riego deficitario controlado (RDC) y el uso de indicadores del estado hídrico de la planta. Este propósito implicaba la evaluación de la aplicabilidad y utilidad del potencial hídrico del tronco (Ψ s ) como herramienta para la programación del riego, así como la evaluación de las respuestas agronómicas y fisiológicas del pistacho a diferentes regímenes de riego y porta-injertos.Para este propósito, pistacheros del cultivar "Kerman", injertados sobre tres patrones diferentes (Pistacia Terebinthus, Pistacia atlantica y Pistacia integerrima) fueron sometidos a tres regímenes de riego. Una estrategia de riego optimo satisfaciendo el 100 % de las necesidades hídricas de los árboles, ajustando estas dotaciones con medidas de potencial hídrico del tronco, y dos estrategias de riego deficitario controlado.El éxito de una estrategia de RDC depende de la precisión del manejo del estrés hídrico siendo el tiempo, la duración y la severidad del estrés aplicado sus principales componentes. Por lo tanto, la aplicación de las estrategias de estrés hídrico se llevó a cabo intentando definir con precisión las fases de crecimiento del fruto y basándose en un umbral establecido del potencial hídrico del tronco.Los tratamientos de RDC se regaron como el control durante toda la temporada, excepto durante la fase II de crecimiento del fruto en el que un nivel de estrés hídrico de -1.5 MPa se impuso a la primera estrategia (T1) y -2.0 MPa a la segunda (T2). El estudio se llevó a cabo durante tres años (2012, 2013 y 2014), en una parcela de pistacho situada en Ciudad Real (Castilla-La Mancha, España).Este trabajo se ha dividido en dos partes principales; la primera parte trata con la respuesta ii fisiológica del pistacho estudiando sus relaciones hídricas y ajustando la programación del riego a las necesidades del cultivo. En la segunda parte se propuso estudiar su respuesta agronómica comparando el crecimiento vegetativo y el potencial productivo en función de cada tratamiento y porta-injerto.El resultado principal de este estudio fue la posibilidad de programar con precisión el riego en una plantación de pistachos cultivados en suelos poco profundos a base de medidas del potencial hídrico del tronco. La utilización del potencial hídrico para la programación de riego se ha traducido en una ec...

show abstract

Sensitivity of root and leaf water status in maize (Zea mays) subjected to mild soil dryness

Cited by 19 publications

References 34 publications

Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings

Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings

Impacts of water stress, environment and rootstock on the diurnal behaviour of stem water potential and leaf conductance in pistachio (Pistacia vera L.)

Improvement of regulated deficit irrigation in pistachio (Pistacia vera L.) : water relations and rootstocks influence

Contact Info

Product

Resources

About