Leaf Area and Water Content Changes after Permanent and Temporary Storage

Juneau, Kevyn J.; Tarasoff, Catherine S.

doi:10.1371/journal.pone.0042604

Cited by 29 publications

(23 citation statements)

References 50 publications

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“…2) from illustrated species, including the length-to-width/2 ratio, dissection index, and sinus (see Additional file 4). The dissection index (DI) is the ratio of an outline’s perimeter to the square root of its area [59–61], i.e., DI = Perimeter/[2sqrt (π × Area)], which is a standardized metric to determine shape complexity, especially regarding the complex degree of bilobate leaves studied here.…”

Section: Methodsmentioning

confidence: 99%

Bilobate leaves of Bauhinia (Leguminosae, Caesalpinioideae, Cercideae) from the middle Miocene of Fujian Province, southeastern China and their biogeographic implications

et al. 2015

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BackgroundMorphological and molecular phylogenetic studies suggest that the pantropical genus Bauhinia L. s.l. (Bauhiniinae, Cercideae, Leguminosae) is paraphyletic and may as well be subdivided into nine genera, including Bauhinia L. s.s. and its allies. Their leaves are usually characteristic bilobate and are thus easily recognized in the fossil record. This provides the opportunity to understand the early evolution, diversification, and biogeographic history of orchid trees from an historical perspective under the framework of morphological and molecular studies.ResultsThe taxonomy, distribution, and leaf architecture of Bauhinia and its allies across the world are summarized in detail, which formed the basis for classifying the bilobate leaf fossils and evaluating the fossil record and biogeography of Bauhinia. Two species of Bauhinia are described from the middle Miocene Fotan Group of Fujian Province, southeastern China. Bauhinia ungulatoides sp. nov. is characterized by shallowly to moderately bilobate, pulvinate leaves with shallowly cordate bases and acute apices on each lobe, as well as paracytic stomatal complexes. Bauhinia fotana F.M.B. Jacques et al. emend. possesses moderately bilobate, pulvinate leaves with moderately to deeply cordate bases and acute or slightly obtuse apices on each lobe.ConclusionsBilobate leaf fossils Bauhinia ungulatoides and B. fotana together with other late Paleogene – early Neogene Chinese record of the genus suggest that Bauhinia had been diverse in South China by the late Paleogene. Their great similarities to some species from South America and South Asia respectively imply that Bauhinia might have undergone extensive dispersals and diversification during or before the Miocene. The fossil record, extant species diversity, as well as molecular phylogenetic analyses demonstrate that the Bauhiniinae might have originated in the Paleogene of low-latitudes along the eastern Tethys Seaway. They dispersed southwards into Africa, migrated from Eurasia to North America via the North Atlantic Land Bridge or floating islands during the Oligocene. Then the genus spread into South America probably via the Isthmus of Panama since the Miocene onward, and underwent regional extinctions in the Boreotropics of mid-high-latitudes during the Neogene climatic cooling. Hence, Bauhinia presently exhibits a pantropical intercontinental disjunct distribution.Electronic supplementary materialThe online version of this article (doi:10.1186/s12862-015-0540-9) contains supplementary material, which is available to authorized users.

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Section: Methodsmentioning

confidence: 99%

Bilobate leaves of Bauhinia (Leguminosae, Caesalpinioideae, Cercideae) from the middle Miocene of Fujian Province, southeastern China and their biogeographic implications

et al. 2015

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“…The dry weight of all above ground parts was used as a measure of shoot biomass, and the dry weight of all underground parts was used as a measure of root biomass. The width of the second blade was measured with ImageJ software as described by Juneau and Tarasoff (Juneau and Tarasoff, 2012) and used as a measure of leaf width.…”

Section: Measurement Of Effects Of Endophytes On Plantsmentioning

confidence: 99%

Endophytes from wild cereals protect wheat plants from drought by alteration of physiological responses of the plants to water stress

Llorens

Sharon

Camañes

et al. 2019

Environmental Microbiology

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Summary Endophytes contribute to plant performance, especially under harsh conditions. We therefore hypothesized that wild plants have retained beneficial endophytes that are less abundant or not present in related crop plants. To test this hypothesis, we selected two endophytes that were found in Sharon goatgrass, an ancestor of wheat, and tested their effect on bread wheat. Both endophytes infected wheat and improved sustainability and performance under water‐limited conditions. To determine how the endophytes modify plant development, we measured parameters of plant growth and physiological status and performed a comparative metabolomics analysis. Endophyte‐treated wheat plants had reduced levels of stress damage markers and reduced accumulation of stress‐adaptation metabolites. Metabolomics profiling revealed significant differences in the response to water stress of endophyte‐treated plants compared with untreated plants. Our results demonstrate the potential of endophytes from wild plants for improvement of related crops and show that the beneficial effects of two endophytes are associated with alteration of physiological responses to water‐limited conditions.

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“…2 ). The former is due to the decrease in cellular turgor pressure that affects the shape of the leaf 24 . The latter is attributed to the difference in chlorophyll reflection, where greener (darker) leaves demonstrate lower reflection.…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive image-derived indices of water-stressed plants using hyperspectral imaging in SWIR and histogram analysis

Kim

Zhang

Zhou

et al. 2015

Sci Rep

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The optical signature of leaves is an important monitoring and predictive parameter for a variety of biotic and abiotic stresses, including drought. Such signatures derived from spectroscopic measurements provide vegetation indices – a quantitative method for assessing plant health. However, the commonly used metrics suffer from low sensitivity. Relatively small changes in water content in moderately stressed plants demand high-contrast imaging to distinguish affected plants. We present a new approach in deriving sensitive indices using hyperspectral imaging in a short-wave infrared range from 800 nm to 1600 nm. Our method, based on high spectral resolution (1.56 nm) instrumentation and image processing algorithms (quantitative histogram analysis), enables us to distinguish a moderate water stress equivalent of 20% relative water content (RWC). The identified image-derived indices 15XX nm/14XX nm (i.e. 1529 nm/1416 nm) were superior to common vegetation indices, such as WBI, MSI, and NDWI, with significantly better sensitivity, enabling early diagnostics of plant health.

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Leaf Area and Water Content Changes after Permanent and Temporary Storage

Cited by 29 publications

References 50 publications

Bilobate leaves of Bauhinia (Leguminosae, Caesalpinioideae, Cercideae) from the middle Miocene of Fujian Province, southeastern China and their biogeographic implications

Bilobate leaves of Bauhinia (Leguminosae, Caesalpinioideae, Cercideae) from the middle Miocene of Fujian Province, southeastern China and their biogeographic implications

Endophytes from wild cereals protect wheat plants from drought by alteration of physiological responses of the plants to water stress

Highly sensitive image-derived indices of water-stressed plants using hyperspectral imaging in SWIR and histogram analysis

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