Implications of the Presence of Maturing Fruit on Carbohydrate and Nitrogen Distribution in Grapevines under Postveraison Water Constraints

Grapevine (Vitis vinifera) berries are sugar and nitrogen (N) sinks between veraison and fruit maturity. Limited photoassimilation, often caused by water constraints, induces reserve total nonstructural carbohydrate (TNC) remobilization, contributing to berry sugar accumulation, while fruit N accumulation can be affected by vine water supply. Although postveraison root carbohydrate remobilization toward the fruit has been identified through 14C tracing studies, it is still unclear when this remobilization occurs during the two phases of berry sugar accumulation (rapid and slow). Similarly, although postveraison N reserve mobilization toward the fruit has been reported, the impact of water constraints during berry N accumulation on its translocation from the different grapevine organs requires clarification. Potted grapevines were grown with or without fruit from the onset of veraison. Vines were irrigated to sustain water constraints, and fortnightly root, trunk, shoot, and leaf structural biomass, starch, soluble sugar, total N, and amino N concentrations were determined. The fruit sugar and N accumulation was also assessed. Root starch depletion coincided with root sucrose and hexose accumulation during peak berry sugar accumulation. Defruiting at veraison resulted in continuous root growth, earlier starch storage, and root hexose accumulation. Leaf N depletion coincided with fruit N accumulation, while the roots of defruited vines accumulated N reserves. Root growth, starch, and N reserve accumulation were affected by maturing fruit during water constraints. Root starch is an alternative source to support fruit sugar accumulation, resulting in reserve starch depletion during rapid fruit sugar accumulation, while root starch refills during slow berry sugar accumulation. On the other hand, leaf N is a source toward postveraison fruit N accumulation, and the fruit N accumulation prevents root N storage.

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Nitrification Inhibitor 3,4-dimethylpyrazole Phosphate Improves Nitrogen Recovery and Accumulation in Cotton Plants by Reducing NO3- Leaching Under 15N-urea Fertilization

10.21203/rs.3.rs-297839/v1 ◽

2021 ◽

Author(s):

Ezio Nalin de Paulo ◽

Fernando Shintate Galindo ◽

Flávio Henrique Silveira Rabêlo ◽

Joaquim José Frazão ◽

Jose Lavres

Keyword(s):

Nitrification Inhibitor ◽

Tropical Soil ◽

Soil Conditions ◽

N Recovery ◽

N Accumulation ◽

Total N ◽

Leaching Losses ◽

Cotton Plants ◽

Use Efficiency ◽

The Impact

Abstract Purpose: The use of nitrification inhibitors could be an interesting alternative to enhance nitrogen (N) fertilizer use efficiency in annual crops such as cotton, under tropical soil conditions. Thus, our aim was to evaluate the efficiency of nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) in a typical tropical soil, evaluating the fate of nitrogen (N-NO3-, N-NH4+ and total N in soil and leached water), N-accumulation and N recovery by cotton plants and soil. Methods: Leaching columns with cotton plants were used to access N-NO3- and N-NH4+ losses in drainage water. Treatments consisted in three N levels applied in side-dressing (corresponding to 50, 100 and 150 kg N ha-1) as 15N-urea with and without DMPP application. An additional treatment (absence of N application in side-dressing) was used as control. Results: 3,4-dimethylpyrazole phosphate was efficient to improve N recovery from applied urea fertilizer in plants and in the soil by reducing NO3- leaching, leading to enhanced N acquisition from fertilizer and soil, augmenting plants N-accumulation, mainly when high N levels above 100 kg N ha-1 were applied. We found that total N recovery increased 31% when 150 kg N ha-1 was applied as urea + DMPP source compared to conventional urea. In addition, DMPP application reduced NO3- leaching losses (c.a. of 11 to 20%), although had no significant effect on shoot and root dry matter yield. Conclusion: The reduction of NO3- leaching losses highlights the potential of DMPP to mitigate the impact of increased urea input on leaching losses thereby improving N use efficiency and N uptake in cotton crop.

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Effectiveness of Fall versus Spring Soil Fertilization of Field-grown Peach Trees

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.126.5.644 ◽

2001 ◽

Vol 126 (5) ◽

pp. 644-648 ◽

Cited By ~ 16

Author(s):

F.J.A. Niederholzer ◽

T.M. DeJong ◽

J.-L. Saenz ◽

T.T. Muraoka ◽

S.A. Weinbaum

Keyword(s):

Vegetative Growth ◽

Prunus Persica ◽

N Uptake ◽

Fruit Size ◽

Growth And Yield ◽

Soil N ◽

N Accumulation ◽

Total N ◽

Peach Trees ◽

Leaf N

Marginally nitrogen (N)-deficient, field-grown peach trees [Prunus persica (L.) Batsch (Peach Group) 'O' Henry'] were used to evaluate seasonal patterns of tree N uptake, vegetative growth, and yield following fall or spring fertilization. Sequential tree excavations and determinations of tree biomass and N contents in Feb. and Aug. allowed estimation of N uptake by fall-fertilized trees between September 1993 and mid-February 1994. Total N uptake (by difference) by spring- fertilized trees as well as additional N uptake by fall-fertilized trees over the spring.summer period was also determined. In fall-fertilized trees, only 24% of tree N accumulation between September 1993 and August 1994 occurred during the fall/dormancy period. Spring- and fall-fertilized trees exhibited comparable vegetative growth, fruit size, and yield despite lower dormant tree N contents and tissue N concentrations in the spring-fertilized trees. Fifty percent of tree leaf N content was available for resorption from leaves for storage in woody tree parts. This amount (N at ~30.kghhhhhhha-1) was calculated to represent more than 80% of the N storage capacity in perennial tree parts of fertilized peach trees. Our data suggest that leaf N resorption, even without fall soil N application, can provide sufficient N from storage to initiate normal growth until plant-available soil N is accessed in spring.

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Nitrogen Accumulation and Loss in a High-input Greenhouse Vegetable Cropping System Elevated by Application of Manures

HortScience ◽

10.21273/hortsci.50.11.1688 ◽

2015 ◽

Vol 50 (11) ◽

pp. 1688-1693 ◽

Cited By ~ 1

Author(s):

Zhi Quan ◽

Bin Huang ◽

Caiyan Lu ◽

Yi Shi ◽

Yanhong Cao ◽

...

Keyword(s):

Soil Layer ◽

Organic N ◽

Nitrogen Accumulation ◽

High Input ◽

Greenhouse Soil ◽

N Accumulation ◽

Total N ◽

Secondary Salinization ◽

The Impact

Much nitrogen (N) is lost in high-input protected cropping systems mainly via leaching of not only nitrate-N but also extractable organic N (EON), but the role of EON in this process is poorly appreciated. A consecutive 3-year plot experiment was conducted to investigate the impact of co-application of manures with chemical N fertilizer on N accumulation and loss in a greenhouse soil rotationally planted with cucumber or tomato and lettuce. Application of manures significantly enhanced the average contents and stocks of NO3−-N, EON, and total N (TN) in 0- to 60-cm soil layer, although EON accumulated within growing season, while NO3−-N accumulated with fluctuation, and TN accumulated gradually throughout the 3-year experiment. With application rate at 120 or 180 t dry manures per hectare per 3 years, the corresponding apparent N surplus was 2710 or 3924 kg⋅ha−1 per 3 years. Due to little increase of biomass N uptakes during vegetable seasons, the accumulated N in soil profile would be a potential loss source, largely via leaching of both nitrate and EON. Application of manures slowed soil acidification but intensified secondary salinization of the greenhouse soil. Considering the manures-induced high soil N accumulation and loss, well-balanced evaluation of the role of manures in high-input agricultural ecosystems is needed.

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Remittances, Economic Growth and Poverty: A Case of African OIC Member Countries

The Pakistan Development Review ◽

10.30541/v57i2pp.121-143 ◽

2018 ◽

Vol 57 (2) ◽

pp. 121-143

Author(s):

Nasim Shah Shirazi ◽

Sajid Amin Javed ◽

Dawood Ashraf

Keyword(s):

Economic Growth ◽

Financial Development ◽

Poverty Reduction ◽

Simultaneous Equation ◽

Equation Model ◽

Annual Data ◽

Simultaneous Equation Model ◽

African Countries ◽

Alternative Source ◽

The Impact

This paper investigates the impact of remittance inflows on economic growth and poverty reduction for seven African countries using annual data from 1992-2010. By using the depth of hunger as a proxy for poverty in a Simultaneous Equation Model (SEM), we find that remittances have statistically significant growth enhancing and poverty reducing impact. Drawing on our estimates, we conclude that financial development level significantly increases the remittances inflows and strengthens poverty alleviating impact of remittances. Results of our study further show a signficant interactive imapct of remittances and finacial develpment on economic growth, suggesting the substitutability between remittance inflows and financial development. We further find that 3 percentage point increase in credit provision to the private sector (financial development) can help eliminate the severe depth of hunger in the region. Remittances, serving an alternative source of private credit, can be effective in this regard. Keywords: Remittance Inflow, Poverty Alleviation, Financial Development, Simultaneous Equation Model

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Awareness-Raising in the TEFL Phonology Classroom

ITL - International Journal of Applied Linguistics ◽

10.2143/itl.145.0.562915 ◽

2004 ◽

Vol 145-146 ◽

pp. 219-268 ◽

Cited By ~ 8

Author(s):

Lawrence Zhang

Keyword(s):

Native Speaker ◽

Psychological Needs ◽

British English ◽

Linguistic Imperialism ◽

Teacher Student ◽

Suprasegmental Features ◽

Discourse Intonation ◽

Awareness Raising ◽

Two Phases ◽

The Impact

This paper reports on two phases of a study of a group of advanced TEFL (teachers-of-English-as-a-foreign-language) students. To raise their awareness of the importance of discourse intonation while they were receiving teacher training, this study focuses on examining their sociocultural and psychological inclinations in the choice of phonological models. The first phase is an exploration of their attitudes toward, a native-speaker variety (British English) and a nonnative (Chinese EFL-speaker) variety of English pronunciation and intonation. The second reports on a didactic intervention study of the impact of activities that engaged the students in the awareness-raising of the importance of suprasegmental features, especially discourse intonation, on self-perceptions of their efficacy and confidence in communication. The results showed a systematic pattern of participant endorsement for a native-speaker model and a clear improvement in theIr perceptions of the importance of suprasegmental features of standard English because of teacher-student co-construction of meaning through interactive awareness-raising activities. The findings are discussed with reference to the students' sociocultural and psychological needs in TEFL training, particularly with reference to recent academic discourse on the issue of “linguistic imperialism” (Canagarajah, 1999; Phillipson, 1992, 1996) and ElL in pedagogy (Jenkins, 1998, 2002) and their wider implications in typical EFL contexts.

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Impacts of separate rejection water treatment on the overall plant performance

Water Science & Technology ◽

10.2166/wst.2003.0240 ◽

2003 ◽

Vol 48 (4) ◽

pp. 139-146 ◽

Cited By ~ 17

Author(s):

B. Wett ◽

J. Alex

Keyword(s):

Water Treatment ◽

Treatment Plant ◽

Operating Experience ◽

Plant Performance ◽

High Tech ◽

State Variables ◽

Total N ◽

Unit Process ◽

Innovative Tool ◽

The Impact

A separate rejection water treatment appears as a high-tech unit process which might be recommendable only for specific cases of an upgrading of an existing wastewater treatment plant. It is not the issue of this paper to consider a specific separate treatment process itself but to investigate the influence of such a process on the overall plant performance. A plant-wide model has been applied as an innovative tool to evaluate effects of the implemented sidestream strategy on the mainstream treatment. The model has been developed in the SIMBA environment and combines acknowledged mathematical descriptions of the activated sludge process (ASM1) and the anaerobic mesophilic digestion (Siegrist model). The model's calibration and validation was based on data from 5 years of operating experience of a full-scale rejection water treatment. The impact on the total N-elimination efficiency is demonstrated by detailed nitrogen mass flow schemes including the interactions between the wastewater and the sludge lane. Additionally limiting conditions due to dynamic N-return loads are displayed by the model's state variables.

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Modifying Carbohydrate Supply to Fruit during Development Changes the Composition and Flavour of Actinidia chinensis var. chinensis ‘Zesy002’ Kiwifruit

Plants ◽

10.3390/plants10071328 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1328

Author(s):

Danielle Le Lievre ◽

Rachelle Anderson ◽

Helen Boldingh ◽

Janine Cooney ◽

Richard Seelye ◽

...

Keyword(s):

Soluble Sugar ◽

Consumer Acceptance ◽

Sugar Accumulation ◽

Actinidia Chinensis ◽

Ripe Fruit ◽

High Carbohydrate ◽

Control Fruit ◽

Low Carbohydrate ◽

Final Weight ◽

Metabolite Accumulation

Consumer acceptance of fruit is determined by size, flavour and ripeness. In this study we investigated how altering the carbohydrate supply to Actinidia chinensis var. chinensis ‘Zesy002′ kiwifruit altered the balance between growth and accumulation of metabolites. Canes were phloem girdled and fruit thinned to a leaf-to-fruit ratio (L:F) of either 2 (Low carbohydrate) or 6 (High carbohydrate) at either 38 (Early) or 86 (Late) days after anthesis (DAA) and compared with ungirdled control canes with a L:F of 3. Fruit growth, metabolite accumulation, cytokinin concentrations and maturation were monitored and the sensory attributes of ripe fruit were assessed. The final weight of Early-High and Late-High carbohydrate fruit was 38% and 16% greater compared with control fruit. High carbohydrate fruit had increased starch,soluble sugar and cytokinin concentrations and fruit began to mature earlier and those with a Low carbohydrate had decreased concentrations and matured later compared with control fruit. Control fruit were described by consumers as more acidic and under-ripe compared with those from Early-High carbohydrate canes, but as sweeter than those from Low carbohydrate canes. This study showed that carbohydrate supply can have a major impact on the growth, sugar accumulation and maturity of ‘Zesy002′ fruit sinks.

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The Arabidopsis Root Tip (Phospho)Proteomes at Growth-Promoting versus Growth-Repressing Conditions Reveal Novel Root Growth Regulators

Cells ◽

10.3390/cells10071665 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1665

Author(s):

Natalia Nikonorova ◽

Evan Murphy ◽

Cassio Flavio Fonseca de Lima ◽

Shanshuo Zhu ◽

Brigitte van de Cotte ◽

...

Keyword(s):

Cell Wall ◽

Root Growth ◽

Growth Regulators ◽

Growth Regulation ◽

Phosphorylation Site ◽

Primary Root ◽

Root Tip ◽

Arabidopsis Root ◽

Growth Promoting ◽

The Impact

Auxin plays a dual role in growth regulation and, depending on the tissue and concentration of the hormone, it can either promote or inhibit division and expansion processes in plants. Recent studies have revealed that, beyond transcriptional reprogramming, alternative auxin-controlled mechanisms regulate root growth. Here, we explored the impact of different concentrations of the synthetic auxin NAA that establish growth-promoting and -repressing conditions on the root tip proteome and phosphoproteome, generating a unique resource. From the phosphoproteome data, we pinpointed (novel) growth regulators, such as the RALF34-THE1 module. Our results, together with previously published studies, suggest that auxin, H+-ATPases, cell wall modifications and cell wall sensing receptor-like kinases are tightly embedded in a pathway regulating cell elongation. Furthermore, our study assigned a novel role to MKK2 as a regulator of primary root growth and a (potential) regulator of auxin biosynthesis and signalling, and suggests the importance of the MKK2 Thr31 phosphorylation site for growth regulation in the Arabidopsis root tip.

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Cost-Effectiveness of Black Soldier Fly Larvae Meal as Substitute of Fishmeal in Diets for Layer Chicks and Growers

Sustainability ◽

10.3390/su13116074 ◽

2021 ◽

Vol 13 (11) ◽

pp. 6074

Author(s):

Esther Khayanga Sumbule ◽

Mary Kivali Ambula ◽

Isaac Maina Osuga ◽

Janice Ghemoh Changeh ◽

David Miano Mwangi ◽

...

Keyword(s):

Weight Gain ◽

Live Weight ◽

Daily Weight Gain ◽

Feed Conversion ◽

Alternative Source ◽

Black Soldier Fly ◽

Promising Alternative ◽

Black Soldier Fly Larvae ◽

Fly Larvae ◽

The Impact

The acceptance of eco-friendly black soldier fly larvae meal (BSFLM) as sustainable alternative protein ingredient in poultry feeds continues to gain momentum worldwide. This study evaluates the impact of BSFLM in layer chick and grower diets on the growth, carcass quality and economic returns. Mean weekly weight gain and total live weight per chick and grower varied significantly. The highest final weight gain was achieved when birds were provided diet with 25.6% BSFLM. Average daily feed intake (ADFI), average daily weight gain (ADG) and overall weight gain of the chick varied significantly, except for the feed conversion ratio (FCR). For grower birds, ADFI, ADG, FCR and overall weight gain did not vary significantly across the various feeding regimes. The weight of the wings and drumsticks had a quadratic response with a maximum weight obtained at 33% inclusion of BSFLM. The weight of the internal organs were not significantly affected by dietary types. Positive cost–benefit ratio and return on investment was recorded for diet types with higher BSFLM inclusion levels (>75%). Diets with 25% and 100% BSFLM inclusion were the most suitable and cost-effective, respectively. Thus, BSFLM represents a promising alternative source of protein that could be sustainably used in the poultry industries.

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Phase transitions from the fifth dimension

Journal of High Energy Physics ◽

10.1007/jhep02(2021)051 ◽

2021 ◽

Vol 2021 (2) ◽

Cited By ~ 1

Author(s):

Kaustubh Agashe ◽

Peizhi Du ◽

Majid Ekhterachian ◽

Soubhik Kumar ◽

Raman Sundrum

Keyword(s):

Bubble Dynamics ◽

Effective Field ◽

Bubble Nucleation ◽

Thin Wall ◽

Black Brane ◽

Composite Higgs ◽

Fifth Dimension ◽

Two Phases ◽

Holographic Description ◽

The Impact

Abstract We study the cosmological transition of 5D warped compactifications, from the high-temperature black-brane phase to the low-temperature Randall-Sundrum I phase. The transition proceeds via percolation of bubbles of IR-brane nucleating from the black-brane horizon. The violent bubble dynamics can be a powerful source of observable stochastic gravitational waves. While bubble nucleation is non-perturbative in 5D gravity, it is amenable to semiclassical treatment in terms of a “bounce” configuration interpolating between the two phases. We demonstrate how such a bounce configuration can be smooth enough to maintain 5D effective field theory control, and how a simple ansatz for it places a rigorous lower-bound on the transition rate in the thin-wall regime, and gives plausible estimates more generally. When applied to the Hierarchy Problem, the minimal Goldberger-Wise stabilization of the warped throat leads to a slow transition with significant supercooling. We demonstrate that a simple generalization of the Goldberger-Wise potential modifies the IR-brane dynamics so that the transition completes more promptly. Supercooling determines the dilution of any (dark) matter abundances generated before the transition, potentially at odds with data, while the prompter transition resolves such tensions. We discuss the impact of the different possibilities on the strength of the gravitational wave signals. Via AdS/CFT duality the warped transition gives a theoretically tractable holographic description of the 4D Composite Higgs (de)confinement transition. Our generalization of the Goldberger-Wise mechanism is dual to, and concretely models, our earlier proposal in which the composite dynamics is governed by separate UV and IR RG fixed points. The smooth 5D bounce configuration we introduce complements the 4D dilaton/radion dominance derivation presented in our earlier work.

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