Legumes from the Paleocene sediments of India and their ecological significance

Bhatia, Harshita; Srivastava, Gaurav; Mehrotra, R. C.

doi:10.1016/j.pld.2022.08.001

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…Widespread during the Eocene (Epihov et al, 2017), the scarcer Paleocene fossil record of Fabaceae indicates an earlier presence of the family in South America (Herrera et al, 2019) and Africa (Koeniguer et al, 1971; Crawley, 1988). The Indian Fabaceae of the late Paleocene–early Eocene suggest a dispersal from Africa to Asia during that time (Chandra et al, 2022; Bhatia et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

“…Water availably was regionally variable, and arid or semi‐arid zones might have been present with some degree of seasonality (Zachos et al 2008). In Asia, tropical climate was present near the equator (northern India and South‐East Asia) and drier climate in southern India and Central‐East China (Quan et al, 2014; Bhatia et al, 2023). Beside the Paleocene–Eocene Thermal Maximum, the Paleocene is also marked by short hyperthermal climatic events characterized by abrupt increases in temperature that could have altered the environmental conditions and changed seasonality and vegetation types in some areas (Speijer, 2003; Bernaola et al, 2008; Hyland et al, 2015; Jehle et al, 2015).…”

Section: Geological Contextmentioning

confidence: 99%

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First fossil woods and palm stems from the mid‐Paleocene of Myanmar and implications for biogeography and wood anatomy

Gentis,

Licht,

De Franceschi

et al. 2024

American J of Botany

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PremiseThe rise of angiosperm‐dominated tropical rainforests has been proposed to have occurred shortly after the Cretaceous‐Paleogene transition. Paleocene fossil wood assemblages are rare yet provide important data for understanding these forests and whether their wood anatomical features can allow us to document these changes.MethodThe anatomy of eleven specimens of Paleocene‐age is described using standard terminology and their affinities to present‐day taxa is investigated.Key resultsWe report here the first middle Paleocene fossil wood specimens from Myanmar, which was near the equator and anchored to India at that time. Some fossils share affinities with Arecaceae, Sapindales (Anacardiaceae, Meliaceae) and Moraceae and possibly Fabaceae or Lauraceae. One specimen is described as a new species and genus: Compitoxylon paleocenicum gen. et sp. nov.ConclusionsThis assemblage reveals the long‐lasting presence of these aforementioned groups in South Asia and suggests the early presence of multiple taxa of Laurasian affinity in Myanmar and India. The wood anatomical features of the dicotyledonous specimens reveal that both “modern” and “primitive” features (in a Baileyan scheme) are present with proportions similar to Paleocene Indian localities. Their anatomical diversity corroborates that tropical flora display “modern” features early in the history of angiosperms, and that their high diversity remained steady afterwards.This article is protected by copyright. All rights reserved.

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Section: Discussionmentioning

confidence: 99%

Section: Geological Contextmentioning

confidence: 99%

First fossil woods and palm stems from the mid‐Paleocene of Myanmar and implications for biogeography and wood anatomy

Gentis,

Licht,

De Franceschi

et al. 2024

American J of Botany

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“…These ecosystems are within the source region for the largest rivers in Southeast Asia and are mainly dominated by K. pygmaea [ 28 , 29 ]. However, these land cover types have suffered severe degradation at a regional scale [ 30 ], triggered by pronounced climate warming over the last several decades [ 31 ] and from progressively increasing anthropogenic disturbances, such as overgrazing [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Research Progress on Dormancy Mechanism and Germination Technology of Kobresia Seeds

Wang

Zhang

et al. 2022

Plants

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Kobresia is a subfamily of Cyperaceae, a perennial herbaceous plant that stores a large amount of organic carbon and nutrients (nitrogen, phosphorus, etc.) in the soil. This type of grass is soft and appreciated by all kinds of farm animals. It is one of the predominantly excellent fodder on the Qinghai–Tibet Plateau. Its good growth plays an important role in developing the local economy and maintaining ecological balance on the Qinghai–Tibet Plateau as well. The main objectives of this review are to systematically present and analyze the factors responsible for the low germination rate of Kobresia and to analyze the physical and chemical methods that are used in order to alleviate dormancy and to improve the germination rate of Kobresia seeds. This is performed in order to lay the foundation for future research in this field. At the same time, we have analyzed the research deficiencies and formulated recommendations for the future. This review will provide comprehensive information in order to reduce the cost of planting Kobresia, as well as to provide theoretical support and technical guidance for the purposes of ecosystem restoration and livestock development.

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Structure, gene composition, divergence time and phylogeny analysis of the woody desert species Neltuma alba, Neltuma chilensis and Strombocarpa strombulifera

Contreras-Díaz,

Carevic,

van den Brink

et al. 2024

Sci Rep

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Neltuma alba (Algarrobo blanco), Neltuma chilensis (Algarrobo Chileno) and Strombocarpa strombulifera (Fortuna) are some of the few drought resistant trees and shrubs found in small highly fragmented populations, throughout the Atacama Desert. We reconstructed their plastid genomes using de novo assembly of paired-end reads from total genomic DNA. We found that the complete plastid genomes of N. alba and N. chilensis are larger in size compared to species of the Strombocarpa genus. The Strombocarpa species presented slightly more GC content than the Neltuma species. Therefore, we assume that Strombocarpa species have been exposed to stronger natural selection than Neltuma species. We observed high variation values in the number of cpSSRs (chloroplast simple sequence repeats) and repeated elements among Neltuma and Strombocarpa species. The p-distance results showed a low evolutionary divergence within the genus Neltuma, whereas a high evolutionary divergence was observed between Strombocarpa species. The molecular divergence time found in Neltuma and Strombocarpa show that these genera diverged in the late Oligocene. With this study we provide valuable information about tree species that provide important ecosystem services in hostile environments which can be used to determine these species in the geographically isolated communities, and keep the highly fragmented populations genetically healthy.

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Legumes from the Paleocene sediments of India and their ecological significance

Cited by 4 publications

References 30 publications

First fossil woods and palm stems from the mid‐Paleocene of Myanmar and implications for biogeography and wood anatomy

First fossil woods and palm stems from the mid‐Paleocene of Myanmar and implications for biogeography and wood anatomy

Research Progress on Dormancy Mechanism and Germination Technology of Kobresia Seeds

Structure, gene composition, divergence time and phylogeny analysis of the woody desert species Neltuma alba, Neltuma chilensis and Strombocarpa strombulifera

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