Leaf, canopy and agronomic water‐use efficiency of field‐grown sugar beet in response to potassium fertilization

Jákli, Bálint; Hauer-Jákli, Melanie; Böttcher, Falk; Müdehorst, J. Meyer zur; Şenbayram, Mehmet; Dittert, Klaus

doi:10.1111/jac.12239

Cited by 22 publications

(15 citation statements)

References 55 publications

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“…K-nutrition is generally considered to alleviate water stress through the following mechanisms: better root soil-prospection, longer leaf lifespan, better cell growing capacity, and, above all, better osmotic regulation [60]. Previous experiments have shown such compensatory effects between K fertilization and water stress [27,49,[62][63][64]. The relative contribution of each mechanism, which depends on the intensity of the K and W stresses and on their timing, is probably species-dependent.…”

Section: Finally What Didmentioning

confidence: 99%

How Does Water-Stressed Corn Respond to Potassium Nutrition? A Shoot-Root Scale Approach Study under Controlled Conditions

et al. 2018

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Potassium (K) is generally considered as being closely linked to plant water dynamics. Consequently, reinforcing K nutrition, which theoretically favors root growth and specific surface, extends leaf lifespan, and regulates stomatal functioning, is often used to tackle water stress. We designed a greenhouse pot-scale device to test these interactions on corn (Zea mays L.), and to analyze their links to plant transpiration. Three levels of K nutrition were combined with two water-supply treatments. Shoot and root development and growth were continuously measured during a 60-day-long experiment. Individual plant transpiration was measured by weighing pots and by calculating water mass balances. The results showed that, although K deficiency symptoms resembled those caused by water shortage, there was no advantage to over-fertilizing water-stressed plants. K failed to decrease either the transpiration per unit leaf surface or to improve water use efficiency. The link between K nutrition and plant transpiration appears solely attributable to the effect of K on leaf area. We conclude that K over-fertilization could ultimately jeopardize crops by enhancing early-stage water transpiration to the detriment of later developmental stages.

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Section: Finally What Didmentioning

confidence: 99%

How Does Water-Stressed Corn Respond to Potassium Nutrition? A Shoot-Root Scale Approach Study under Controlled Conditions

et al. 2018

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“…In practice, this research concludes with the indication of secondary characteristics that can be used for the selection of more productive genotypes in dry conditions, that is, more agronomically efficient genotypes in water use [25], favoring the practice of a more sustainable agriculture in the use of water resources. More productive and drought-adapted plants imply a lower ratio of grain yield per unit of available or evapotranspirated water [26].…”

Section: Introductionmentioning

confidence: 99%

Can Genetic Progress for Drought Tolerance in Popcorn Be Achieved by Indirect Selection?

et al. 2019

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The objective of this study was to estimate the direct and indirect effects of agricultural, morphological, physiological, and root traits of popcorn lines, under two conditions of water supply: full irrigation (FI) and drought stress (DS). A complete randomized block design with three replications was used to evaluate the following traits: expanded popcorn volume per hectare (EPV), 100-grain weight (100GW), mean ear length, mean ear diameter, number of grains per row (NGR), prolificacy (PRO), anthesis to silking interval, tassel length, number of tassel branches, plant height, shoot dry matter, green index (SPAD), and canopy temperature depression (CTD), root angle (RA), tap root volume (TRV), and crown root volume (CRV). Analyses of variance and path analysis, and subsequent partitioning of direct and indirect effects were performed. For the traits EPV, PRO, CTD, RA, CRV and TRV, the genotype x environment interaction was significant. Drought stress had significant effects on EPV (−7.15%), 100GW (−23.52%), SPAD (−29.31%), CTD (87.15%), RA (24.54%), and CRV (44.89%). The traits NGR and SPAD were found to be decisive for the expression of EPV. The exploitation of these traits by indirect selection is expected to induce increments in EPV in environments under DS and FI.

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“…The result displayed that water deficit and potassium application could increase carbon import flux in fruit, which were beneficial to carbon accumulation, and dCsup/dt were significantly higher than CK ( Figure 3 ). Water and potassium have an important effect on sucrose and starch metabolism, which determine carbon allocation in the fruit, by regulating enzyme activity in Table 4 ( Reynolds and Tuberosa, 2008 ; Rosa et al, 2009 ; Witt et al, 2012 ; Jákli et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

The Associated With Carbon Conversion Rate and Source–Sink Enzyme Activity in Tomato Fruit Subjected to Water Stress and Potassium Application

2021

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Carbon metabolism in higher plants is a basic physiological metabolism, and carbon allocation and conversion require the activity of various enzymes in metabolic processes that alter the content and overall composition of sugars in the sink organ. However, it is not known how various enzymes affect carbon metabolism when tomato plants are subjected to water stress or treated with potassium. Although the process of carbon metabolism is very complex, we used the carbon conversion rate to compare and analyze the enzyme activities related to sugar metabolism and find out which carbon conversion rate are the most important. Results showed that water stress and potassium increased carbon import flux in the fruit, which was beneficial to carbon accumulation. Water deficit increased the activity of sucrose synthase (SuSy) and starch phosphorylase (SP) and decreased the activity of sucrose phosphate synthase (SPS) and adenosine diphosphate glucose pyrophosphorylase (AGPase) in the source. Water stress increased the activity of acid invertase (AI), SuSy and SP but decreased the activity of AGPase in the sink. Potassium modified the balance of enzymes active in sugar and starch metabolism by increasing the activity of AI, SuSy, SPS and SP and significantly decreasing the activity of AGPase, resulting in increase of hexose. Canonical correlational analysis revealed that the carbon conversion rate was mainly affected by the relative rate of conversion of sucrose to fructose and glucose [p1(t)] and glucose to starch [p5m(t)]. SuSy and AGPase had the greatest effect on enzyme activity in the fruit; respectively regulated p1(t) and p5m(t).

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Leaf, canopy and agronomic water‐use efficiency of field‐grown sugar beet in response to potassium fertilization

Cited by 22 publications

References 55 publications

How Does Water-Stressed Corn Respond to Potassium Nutrition? A Shoot-Root Scale Approach Study under Controlled Conditions

How Does Water-Stressed Corn Respond to Potassium Nutrition? A Shoot-Root Scale Approach Study under Controlled Conditions

Can Genetic Progress for Drought Tolerance in Popcorn Be Achieved by Indirect Selection?

The Associated With Carbon Conversion Rate and Source–Sink Enzyme Activity in Tomato Fruit Subjected to Water Stress and Potassium Application

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