Assessing potato canopy growth and development at the individual leaf level to improve the understanding of the plant source–sink relations

2021 ◽  
pp. 1-22
Author(s):  
Juliano S. Oliveira ◽  
Hamish E. Brown ◽  
Derrick J. Moot
Keyword(s):  
Growth And Development ◽  
Plant Source ◽  
Individual Leaf ◽  
Leaf Level ◽  
The Individual ◽  
Source Sink

scholarly journals “Diminishing Returns” in the Scaling between Leaf Area and Twig Size in Three Forest Communities Along an Elevation Gradient of Wuyi Mountain, China

Forests ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 1138 ◽  
Author(s):  
Guojie Zhu ◽  
Karl Joseph Niklas ◽  
Man Li ◽  
Jun Sun ◽  
Min Lyu ◽  
...  
Keyword(s):  
Elevation Gradient ◽  
Woody Species ◽  
Forest Community ◽  
Scaling Exponent ◽  
Mass Scaling ◽  
Individual Leaf ◽  
Diminishing Returns ◽  
Leaf Level ◽  
Community Types ◽  
The Individual

Background and aims: The “diminishing returns” hypothesis postulates that the scaling exponent governing the lamina area versus lamina mass scaling relationships has, on average, a numerical value less than one. Theoretically, a similar scaling relationship may exist at the twig level. However, this possibility has not been explored empirically. Methods: We tested both hypotheses by measuring the lamina area and mass, petiole mass of individual leaves, and the total foliage area and stem mass of individual current-year shoots (twigs) of 64 woody species growing in three characteristic forest community types: (1) Evergreen broad-leaved, (2) mixed coniferous and broad-leaved, and (3) deciduous. Key results: The results demonstrate that lamina area vs. mass and lamina area vs. petiole mass differ significantly among the three forest types at both the individual leaf and twig levels. Nevertheless, the scaling exponents of lamina area vs. mass were <1.0 in each of the three community types, as were the corresponding exponents for lamina area vs. petiole mass, both within and across the three community types. Similar trends were observed at the individual twig level. The numerical values of the scaling exponent for lamina area vs. petiole mass and total foliage area vs. stem mass per twig decreased with increased elevation. Conclusions: These data support the “diminishing returns” hypothesis at both the individual leaf level and at the individual twig level, phenomena that can inform future inquiries into the mechanistic basis of biomass allocation patterns to physiological (leaf) and mechanical (stem) plant organs.

Physiology of Larval Feeding

2018 ◽  
Keyword(s):  
Growth And Development ◽  
Marine Invertebrate ◽  
Larval Growth ◽  
Circulatory System ◽  
Future Research ◽  
Larval Feeding ◽  
Digestive Physiology ◽  
Larval Body ◽  
The Individual ◽  
Invertebrate Larvae

The functional properties of marine invertebrate larvae represent the sum of the physiological activities of the individual, the interdependence among cells making up the whole, and the correct positioning of cells within the larval body. This chapter examines physiological aspects of nutrient acquisition, digestion, assimilation, and distribution within invertebrate larvae from an organismic and comparative perspective. Growth and development of larvae obviously require the acquisition of “food.” Yet the mechanisms where particulate or dissolved organic materials are converted into biomass and promote development of larvae differ and are variably known among groups. Differences in the physiology of the digestive system (secreted enzymes, gut transit time, and assimilation) within and among feeding larvae suggest the possibility of an underappreciated plasticity of digestive physiology. How the ingestion of seawater by and the existence of a circulatory system within larvae contribute to larval growth and development represent important topics for future research.

scholarly journals An ecosystem-scale perspective of the net land methanol flux: synthesis of micrometeorological flux measurements

2015 ◽  
Vol 15 (13) ◽  
pp. 7413-7427 ◽  
Author(s):  
G. Wohlfahrt ◽  
C. Amelynck ◽  
C. Ammann ◽  
A. Arneth ◽  
I. Bamberger ◽  
...  
Keyword(s):  
Atmospheric Chemistry ◽  
Dominant Role ◽  
Terrestrial Ecosystem ◽  
Surface Wetness ◽  
Flux Synthesis ◽  
Leaf Level ◽  
Flux Measurements ◽  
The Rich ◽  
Study Sites ◽  
Source Sink

Abstract. Methanol is the second most abundant volatile organic compound in the troposphere and plays a significant role in atmospheric chemistry. While there is consensus about the dominant role of living plants as the major source and the reaction with OH as the major sink of methanol, global methanol budgets diverge considerably in terms of source/sink estimates, reflecting uncertainties in the approaches used to model and the empirical data used to separately constrain these terms. Here we compiled micrometeorological methanol flux data from eight different study sites and reviewed the corresponding literature in order to provide a first cross-site synthesis of the terrestrial ecosystem-scale methanol exchange and present an independent data-driven view of the land–atmosphere methanol exchange. Our study shows that the controls of plant growth on production, and thus the methanol emission magnitude, as well as stomatal conductance on the hourly methanol emission variability, established at the leaf level, hold across sites at the ecosystem level. Unequivocal evidence for bi-directional methanol exchange at the ecosystem scale is presented. Deposition, which at some sites even exceeds methanol emissions, represents an emerging feature of ecosystem-scale measurements and is likely related to environmental factors favouring the formation of surface wetness. Methanol may adsorb to or dissolve in this surface water and eventually be chemically or biologically removed from it. Management activities in agriculture and forestry are shown to increase local methanol emission by orders of magnitude; however, they are neglected at present in global budgets. While contemporary net land methanol budgets are overall consistent with the grand mean of the micrometeorological methanol flux measurements, we caution that the present approach of simulating methanol emission and deposition separately is prone to opposing systematic errors and does not allow for full advantage to be taken of the rich information content of micrometeorological flux measurements.

scholarly journals Scholarship and the Bahá’í Community

1988 ◽  
Vol 1 (1) ◽  
pp. 25-38
Author(s):  
Moojan Momen
Keyword(s):  
Growth And Development ◽  
Spiritual Life ◽  
Individual Student ◽  
Good Fortune ◽  
Baha'i Faith ◽  
The World ◽  
History Of ◽  
Formal Basis ◽  
The Individual ◽  
Vast Range

As the Bahá’í Faith emerges from obscurity, Bahá’í scholars will have an important role in three fields: the presentation of Bahá’í Faith to the world; the defense of the Bahá’í Faith from attacks; and the intellectual growth and development of the Bahá’í community. This paper discusses the question of the place of scholarship in the Bahá’í community. The value of Bahá’í studies to the Bahá’í community is analyzed. The problems that may arise for Bahá’í scholars in relation to their own spiritual life and also in relation to the Bahá’í community are discussed. Some suggestions are then made with regard to the question of what academic approaches are most likely to be fruitful in the study of the Bahá’í Faith. Finally, consideration is given to the mutual obligations of the Bahá’í scholar and the Bahá’í community (in particular, the Bahá’í administrative institutions). Every Bahá’í who surveys the vast range of doctrines and concepts enshrined in the holy writings of the Bahá’í Faith or whose imagination is captured by the intensity of its brief history must, to some extent, be inspired to make a more thorough study of some aspect that interests him or her. To some is given the good fortune to have both the opportunity and inclination to put this study on a more formal basis. Whether this be at an institute of learning or through private study and research, there are many areas of the teachings and history of the Bahá’í Faith that invite painstaking research and thoughtful analysis. Such study is of great benefit to the Bahá’í community as a whole, quite apart from the immense satisfaction that it can bring to the individual student. There are also dangers in such study, particularly for the individual concerned, and often the extent of this danger is not appreciated by someone just setting out on such a course of study.

scholarly journals Impact of Climate Change on Crop & Predict the Disease

2021 ◽  
Vol 9 (VI) ◽  
pp. 3063-3070
Author(s):  
Shraddha S. Garud
Keyword(s):  
Climate Change ◽  
Growth And Development ◽  
Climate Changes ◽  
Plant Diseases ◽  
Life Stages ◽  
Social Changes ◽  
Temporal And Spatial Distribution ◽  
Climate Influences ◽  
Temporal And Spatial ◽  
The Individual

The prime need of this world is that the simplest agriculture which decides the event of each country because the survival of the individual is completely obsessed with farming and its best production. Climate changes are in response to changes within the hydrosphere, biosphere, and other atmospheric and interacting factors. Human activities driven by demographic, economic, technological, and social changes have a big impact on activity. The climate influences the incidence further as the temporal and spatial distribution of plant diseases. the foremost factors that control the growth and development of diseases are temperature, light, and water. Climate affects all life stages of the pathogen and host and poses a challenge to many pathosystems. The environmental change, especially when combined with the pathogen and host introductions, may cause unprecedented effects.

Introduction

2019 ◽  
pp. 1-94
Author(s):  
Dmitri Levitin
Keyword(s):  
Early Modern ◽  
Golden Age ◽  
Growth And Development ◽  
Comparative Assessment ◽  
Intellectual Activity ◽  
Structural Process ◽  
Renaissance Humanism ◽  
Introductory Overview ◽  
The Individual

What effect did the structural process of religious confessionalisation have on the production, publication, and dissemination of works of erudition, and on shaping those aspects of European intellectual activity that have come to be known as the ‘humanities’? This introductory overview offers a comparative assessment of that question, focussing separately on each confessional space: Catholic, Reformed, and Lutheran, and the individual regions within each. It stresses the importance of confessional investment in erudite practices for stimulating their growth and development. At the same time, it emphasises the importance of trans-confessional emulation as an agent of intellectual change. It is suggested that early modern erudition and the conditions in which it developed should be conceptualised on their own terms, rather than as a triumphant precursor of the ‘modern’ humanities or a pale remnant of the golden age of a pre-confessional Renaissance humanism.

Professional Growth and Development

2015 ◽  
pp. 165-181
Keyword(s):  
Health Care ◽  
Lifelong Learning ◽  
Professional Growth ◽  
Growth And Development ◽  
Health Care Services ◽  
Formal Education ◽  
Continuous Development ◽  
Care Services ◽  
The Individual

The purpose of this chapter is to explore why a medical professional's career is one of lifelong learning and growth. Even after the period of formal education is over, continuous development and maintenance of skills is essential. Along with this, attention is also directed towards the improvement of health care services at the individual and general levels.

scholarly journals Changes in Number and Weight of Wheat and Triticale Grains to Manipulation in Source-Sink Relationship

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
E. Ballesteros-Rodríguez ◽  
C. G. Martínez-Rueda ◽  
E. J. Morales-Rosales ◽  
G. Estrada-Campuzano ◽  
G. F. González
Keyword(s):  
Yield Components ◽  
Genetic Improvement ◽  
Wheat Cultivar ◽  
Experimental Manipulation ◽  
Grain Weight ◽  
Agricultural Technology ◽  
Growing Seasons ◽  
Yield And Yield Components ◽  
The Individual ◽  
Source Sink

The source-sink ratio experimental manipulation has helped to define whether a crop is limited by source or sink or co-limited by both. There is no evidence in triticale of source-sink manipulations effects on yield and yield components. Two experiments were accomplished during 2008 and 2009 growing seasons at the Universidad Autónoma del Estado de México, México, and one in 2010 at the National Institute of Agricultural Technology in Pergamino, Argentina. Two triticale cultivars (line 4 and 7) and one wheat cultivar (Tollocan) were used. Source-sink relations were modified at anthesis by thinning, degraining, shading, and total defoliation procedures. Changes in the source-sink relation affected yields in both species differentially. The changes in yield due to cultivars and treatments were explained mainly by the number of grains rather than by their individual grain weight. The number of grains was affected by all treatments in both species, while the individual grain weight was increased by thinning and degraining mainly in triticale. A greater number of fertile florets in triticale were associated with their higher rate of abortion compared to wheat. These results could help to better understand crop management and genetic improvement.

The Establishment of the English Province of the Society of Jesus

1984 ◽  
Vol 17 (2) ◽  
pp. 121-139 ◽  
Author(s):  
Thomas M. McCoog
Keyword(s):  
Growth And Development ◽  
Religious Life ◽  
Spiritual Practices ◽  
Society Of Jesus ◽  
Subsequent Growth ◽  
Men And Women ◽  
Ignatian Spirituality ◽  
The World ◽  
Jesuit Mission ◽  
The Individual

And touching our Society be it known to you that we have made a league–all the Jesuits of the world, whose succession and multitude must overreach all the practices of England–cheerfully to carry the cross you shall lay upon us and never to despair of your recovery, while we have a man left to enjoy your Tyburn, or to be racked with your torments or consumed with your prisons. The expense is reckoned, the enterprise is begun, it is of God, it cannot be withstood. So the faith was planted, so it must be restored.The Jesuit mission to England so proudly announced by Edmund Campion in 1580 was a venture hesitantly undertaken by the Society of Jesus. There was careful, prayerful discernment not only before Father General Everard Mercurian decided in its favour but also throughout its subsequent growth and development. According to the Formula of the Institute, in a sense the Jesuit rule, the purpose and goal of the Society was twofold: the salvation and sanctification of both the individual Jesuits and of their fellow men and women. The entire thrust of Ignatian spirituality was the consideration of the first in so far as it advanced the second. Ignatius urged that all the ordinary practices and customs of religious life be considered in the context of the apostolate and either executed or modified in so far as they advanced the order’s goals. Because of the stress that Ignatius had placed on the Society’s works, he was reluctant to prescribe any universally binding spiritual practices. Indeed, among the wide powers granted to the General in the order’s Constitutions was that to grant dispensations ‘in particular cases which require such dispensation, while he takes account of the persons, places, times, and other circumstances.’

Sign in / Sign up

Export Citation Format

Share Document