A New Interpretation of the Successive Cambia of Some Nyctaginaceae as Interxylary Phloem

2021 ◽  
pp. 000-000
Author(s):  
Israel L. Cunha Neto ◽  
Marcelo R. Pace ◽  
Veronica Angyalossy
Keyword(s):  
Successive Cambia ◽  
Interxylary Phloem ◽  
New Interpretation

scholarly journals Linking the Evolution of Development of Stem Vascular System in Nyctaginaceae and Its Correlation to Habit and Species Diversification

2021 ◽  
Author(s):  
Israel L. Cunha Neto ◽  
Marcelo Rodrigo Pace ◽  
Rebeca Hernández-Gutiérrez ◽  
Veronica Angyalossy
Keyword(s):  
Developmental Stages ◽  
Vascular System ◽  
A Priori ◽  
Secondary Growth ◽  
Stem Anatomy ◽  
Species Diversification ◽  
Successive Cambia ◽  
The Family ◽  
Interxylary Phloem ◽  
Cambial Variants

Abstract Background: The presence of alternative patterns of secondary growth in stems of Nyctaginaceae has been known for a long time. Still, the interpretation of types of cambial variants are controversial. The knowledge on stem anatomical diversity in Nyctaginaceae, which is diverse also in habits, offers the unique opportunity not only to investigate the evolution of complex developments, but also to address how these anatomies shifted within habits and how the acquisition of novel cambial variants and habit transitions impacted the diversification of the family. Methods: We integrated developmental data with a phylogenetic framework to investigate the diversity and evolution of stem anatomy in Nyctaginaceae using phylogenetic comparative methods, reconstructing ancestral states, and examining whether anatomical shifts correspond to species diversification rate shifts in the family. Results: Two types of cambial variants, interxylary phloem and successive cambia, were recorded in Nyctaginaceae, which result from four different ontogenies. These ontogenetic trajectories depart from two distinct primary vascular structures (regular or polycyclic eustele) yet, they contain shared developmental stages which generate stem morphologies with deconstructed boundaries of morphological categories (continuum morphology). Unlike our a priori hypotheses, interxylary phloem is reconstructed as the ancestral character for the family, with three ontogenies characterized as successive cambia evolving in few taxa. Cambial variants are not contingent in habits, and their transitions are independent from species diversification.Conclusions: Our findings suggests that multiple developmental mechanisms, such as heterochrony and heterotopy generate the transitions between interxylary phloem and successive cambia. Intermediate between these two extremes are present in Nyctaginaceae, suggesting a continuum morphology across the family as a generator of anatomical diversity.

scholarly journals Formation of medullary phloem in Argyreia nervosa (Burm. f.) Bojer

2019 ◽  
Vol 6 (2) ◽  
pp. 151-159 ◽  
Author(s):  
Kilas K Kapadane ◽  
Ravindra A Shelke ◽  
Amit D Gondaliya ◽  
Kishore S. Rajput
Keyword(s):  
Secondary Growth ◽  
Sieve Elements ◽  
Successive Cambia ◽  
Primary Growth ◽  
Interxylary Phloem ◽  
Argyreia Nervosa ◽  
Internal Phloem

Histologically, family Convolvulaceae is characterised by the presence of successive cambia, medullary (internal/intraxylary) and interxylary phloem in majority of the species, whereas some of the members are devoid of successive cambia and medullary bundles. The present study on Argyreia nervosa (Burm. f.) Bojer showed the presence of medullary bundles while internal phloem was absent during the primary growth. As the secondary growth progressed, successive cambia initiated from the pericyclic parenchyma. Development of medullary bundles began along with the regular protoxylem and protophloem while formation of intraxylary phloem was observed only after the initiation of secondary growth. Medullary/intraxylary sieve elements began to develop from the marginal pith cells. In thick stems, small segments of internal cambium initiated between the protoxylem and internal phloem. This internal cambium was functionally unidirectional and produced internal phloem centripetally. Developmental particulars are described in details along with its significance.

Esotericism and the “Coded Word” in Mormonism

2011 ◽  
Vol 2 (1) ◽  
pp. 29-54
Author(s):  
Clyde Forsberg Jr.
Keyword(s):  
Popular Religion ◽  
Latter Day Saints ◽  
Social Commentary ◽  
Joseph Smith ◽  
Playing Field ◽  
Book Of Mormon ◽  
Divine Inspiration ◽  
History Of ◽  
New Interpretation ◽  
New Religion

In the history of American popular religion, the Latter-day Saints, or Mormons, have undergone a series of paradigmatic shifts in order to join the Christian mainstream, abandoning such controversial core doctrines and institutions as polygamy and the political kingdom of God. Mormon historians have played an important role in this metamorphosis, employing a version (if not perversion) of the Church-Sect Dichotomy to change the past in order to control the future, arguing, in effect, that founder Joseph Smith Jr’s erstwhile magical beliefs and practices gave way to a more “mature” and bible-based self-understanding which is then said to best describe the religion that he founded in 1830. However, an “esoteric approach” as Faivre and Hanegraaff understand the term has much to offer the study of Mormonism as an old, new religion and the basis for a more even methodological playing field and new interpretation of Mormonism as equally magical (Masonic) and biblical (Evangelical) despite appearances. This article will focus on early Mormonism’s fascination with and employment of ciphers, or “the coded word,” essential to such foundation texts as the Book of Mormon and “Book of Abraham,” as well as the somewhat contradictory, albeit colonial understanding of African character and destiny in these two hermetic works of divine inspiration and social commentary in the Latter-day Saint canonical tradition.

BKR (BADAN KEAMANAN RAKYAT): Cikal Bakal Tentara Indonesia?

Metahumaniora ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 389
Author(s):  
Widyo Nugrahanto
Keyword(s):  
Armed Forces ◽  
Civil Defense ◽  
The Other ◽  
Main Subject ◽  
Japanese Occupation ◽  
Historical Method ◽  
New Interpretation

AbstrakPenelitian ini berjudul BKR (Badan Kemanan Rakyat):Cikal Bakal Tentara Indonesia?!. Penelitian ini merupakan interpretasi baru tentang cikal bakal TNI, yang umumnya banyak merujuk pada PETA (Pembela Tanah Air). Metode penelitian yang digunakan adalah Metode Sejarah.Metode Sejarah memiliki empat tahapan yaitu Heuristik, Kritik, Interpretasi dan Historiografi.Sumber-sumber penelitian ini menggunakan koran-koran sezaman, majalah sezaman, dan buku. BKR dianggap sebagai cikal bakal TNI didasarkan beberapa sebab. Pertama, atas dasar legalitas formal, PETA telah dibubarkan sehingga BKR adalah satuan militer yang pertama kali dibentuk setelah Indonesia merdeka. BKR selanjutnya melahirkan pembentukan TKR (Tentara Keamanan Rakyat), TKR (Tentara Keselamatan Rakyat), TRI (Tentara Republik Indonesia) dan TNI (Tentara Nasional Indonesia). Kedua, jika PETA dianggap sebagai cikal bakal TNI, maka KNIL dan beberapa satuan keprajuritan diabaikan. Padahal, beberapa bekas perwira KNIL memiliki peran penting di tubuh BKR hingga TNI.Kata kunci: BKR, Tentara, TNIAbstractThe main subject this study is BKR – Indonesian civil defense corps – as origin of Indonesian Military. This study is new interpretation about the origin of TNI (Indonesian National Armed Forces) now. Many opinion refer to PETA as civil defense corps in Japanese occupation era. Study emlpoys a Historical Method, which consists of four stage: Heuristic, Critic, Interpretation, Historiography. The study utilize some sources such as newspaper, magazine, and book. Main finding of this study is PETA had dispersed as legality and formally and BKR was formed as the firts corps after Independence of Indonesia. Futhermore, BKR changed to TKR (Tentara Keamanan Rakyat), TKR (Tentara Keselamatan Rakyat), TRI (Tentara Republik Indonesia) until TNI (Tentara Nasional Indonesia). If PETA is considered as origins of Indonesian Military, then it ignore KNIL – a colonial armed forces – and the other defence corps. Even though the eks KNIL’s officer have important role in military managenment of BKR until TNI.Keywords: BKR, Military, TNI

BKR (BADAN KEAMANAN RAKYAT): Cikal Bakal Tentara Indonesia?

Metahumaniora ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 389
Author(s):  
Widyo Nugrahanto
Keyword(s):  
Armed Forces ◽  
Civil Defense ◽  
The Other ◽  
Main Subject ◽  
Japanese Occupation ◽  
Historical Method ◽  
New Interpretation

AbstrakPenelitian ini berjudul BKR (Badan Kemanan Rakyat):Cikal Bakal Tentara Indonesia?!. Penelitian ini merupakan interpretasi baru tentang cikal bakal TNI, yang umumnya banyak merujuk pada PETA (Pembela Tanah Air). Metode penelitian yang digunakan adalah Metode Sejarah.Metode Sejarah memiliki empat tahapan yaitu Heuristik, Kritik, Interpretasi dan Historiografi.Sumber-sumber penelitian ini menggunakan koran-koran sezaman, majalah sezaman, dan buku. BKR dianggap sebagai cikal bakal TNI didasarkan beberapa sebab. Pertama, atas dasar legalitas formal, PETA telah dibubarkan sehingga BKR adalah satuan militer yang pertama kali dibentuk setelah Indonesia merdeka. BKR selanjutnya melahirkan pembentukan TKR (Tentara Keamanan Rakyat), TKR (Tentara Keselamatan Rakyat), TRI (Tentara Republik Indonesia) dan TNI (Tentara Nasional Indonesia). Kedua, jika PETA dianggap sebagai cikal bakal TNI, maka KNIL dan beberapa satuan keprajuritan diabaikan. Padahal, beberapa bekas perwira KNIL memiliki peran penting di tubuh BKR hingga TNI.Kata kunci: BKR, Tentara, TNIAbstractThe main subject this study is BKR – Indonesian civil defense corps – as origin of Indonesian Military. This study is new interpretation about the origin of TNI (Indonesian National Armed Forces) now. Many opinion refer to PETA as civil defense corps in Japanese occupation era. Study emlpoys a Historical Method, which consists of four stage: Heuristic, Critic, Interpretation, Historiography. The study utilize some sources such as newspaper, magazine, and book. Main finding of this study is PETA had dispersed as legality and formally and BKR was formed as the firts corps after Independence of Indonesia. Futhermore, BKR changed to TKR (Tentara Keamanan Rakyat), TKR (Tentara Keselamatan Rakyat), TRI (Tentara Republik Indonesia) until TNI (Tentara Nasional Indonesia). If PETA is considered as origins of Indonesian Military, then it ignore KNIL – a colonial armed forces – and the other defence corps. Even though the eks KNIL’s officer have important role in military managenment of BKR until TNI.Keywords: BKR, Military, TNI

A New Interpretation of the Structure and Solvent Dependence of the Far UV Circular Dichroism Spectrum of Short Oligopeptides

2019 ◽  
Author(s):  
Anshuman Kumar ◽  
Reinhard Schweitzer-Stenner ◽  
Bryan Wong
Keyword(s):  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Cd Spectra ◽  
Functional Theory ◽  
Polyproline Ii ◽  
Solvent Dependence ◽  
Explicit Consideration ◽  
New Interpretation ◽  
Implicit And Explicit ◽  
Explicit Water

In this work, we carry out new time-dependent density functional theory calculations on the cationic tripeptide GAG in implicit and explicit water to determine the transitions that give rise to the observed CD signals of polyproline II and β-strand conformations. Our results reveal a plethora of electronic transitions that are governed by configurational interactions between multiple molecular orbital transitions of comparable energy. We also show that reproducing the CD spectra of polyproline II and β-strand conformations requires the explicit consideration of water molecules. The structure dependence of delocalized occupied orbitals contributes to the experimentally-observed invalidation of Flory’s isolated pair hypothesis.

A New Interpretation of the Structure and Solvent Dependence of the Far UV Circular Dichroism Spectrum of Short Oligopeptides

2019 ◽  
Author(s):  
Anshuman Kumar ◽  
Reinhard Schweitzer-Stenner ◽  
Bryan Wong
Keyword(s):  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Cd Spectra ◽  
Functional Theory ◽  
Polyproline Ii ◽  
Solvent Dependence ◽  
Explicit Consideration ◽  
New Interpretation ◽  
Implicit And Explicit ◽  
Explicit Water

In this work, we carry out new time-dependent density functional theory calculations on the cationic tripeptide GAG in implicit and explicit water to determine the transitions that give rise to the observed CD signals of polyproline II and β-strand conformations. Our results reveal a plethora of electronic transitions that are governed by configurational interactions between multiple molecular orbital transitions of comparable energy. We also show that reproducing the CD spectra of polyproline II and β-strand conformations requires the explicit consideration of water molecules. The structure dependence of delocalized occupied orbitals contributes to the experimentally-observed invalidation of Flory’s isolated pair hypothesis.

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