MORPHOLOGICAL STRUCTURES OF RHIZOPHORA APICULATA BLUME. and RHIZOPHORA MUCRONATA LAM.

Shamin-Shazwan, Kamaruddin; Shahari, Rozilawati; Amri, Che Nurul Aini Che; Kassim, Zaleha; Ahmad, Zuhairi

doi:10.26480/gws.01.2021.01.04

Cited by 6 publications

(4 citation statements)

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“…Rhizopora apiculata has characteristic rooting that reaches up to 5 meters in height and sometimes has aerial roots from the branches. Prop roots and stilt roots (lateral roots from the base of the stem often curving downward to meet the substrate) are mainly seen in R. apiculata (Shamin-Shazwan et al 2021). One of the characteristics of R. apiculata is that it has structures that protrude in various directions around its trunk to the ground, which are specialized branches with positive geotropism that form a large number of roots when in contact with the soil (De Oliveira et al 2021).…”

Section: Discussionmentioning

confidence: 99%

Environmental risk assessment of Pb, Cu, Zn, and Cd concentrations accumulated in selected mangrove roots and surrounding their sediment

ROZIRWAN,

KHOTIMAH,

PUTRI

et al. 2024

Biodiversitas

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Abstract. Rozirwan, Khotimah NN, Putri WAE, Fauziyah, Aryawati R, Damiri N, Isnaini, Nugroho RY. 2023. Environmental risk assessment of Pb, Cu, Zn, and Cd concentrations accumulated in selected mangrove roots and surrounding their sediment. Biodiversitas 24: 6733-6742. Mangroves as the largest coastal ecosystem can accumulate heavy metals from their environment. This study aimed to evaluate the environmental risk associated with heavy metal pollution accumulated in the roots of mangroves and the surrounding sediments. The mangrove roots consisted of three species Sonneratia caseolaris, Rhizopora apiculata, and Xylocarpus granatum, collected from three observation stations within the Payung Island mangrove ecosystem in South Sumatra, Indonesia. The concentrations of heavy metals were determined using atomic absorption spectrometry. Statistical analysis employed one-way Analysis of Variance (ANOVA). At the same time, ecological risk assessment utilized the Bioconcentration Factor (BCF), Geoaccumulation Index (Igeo), Contamination factor (Cf), and Pollution Load Index (PLI). The highest sediment concentrations of heavy metals at station 3 were 12.786±0.26 mg/kg for Pb, 10.413±0.011 mg/kg for Cu, 42.752±0.053 mg/kg for Zn, and Cd was not detected. In mangrove roots, the highest concentrations were found in S. caseolaris, with 2.596±0.002 mg/kg for Pb and 11.881±0.015 mg/kg for Zn, while X. granatum exhibited 8.850±0.011 mg/kg for Cu and 0.160±0.020 mg/kg for Cd. BCF values <1 were categorized as exclusion, Igeo<0 indicated non-contamination, Cf<1 signified low pollution, and PLI<0 denoted an unpolluted status. Based on the results, the quality of the mangrove ecosystems affected by heavy metal pollution is currently considered safe regarding environmental risk assessment.

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Section: Discussionmentioning

confidence: 99%

Environmental risk assessment of Pb, Cu, Zn, and Cd concentrations accumulated in selected mangrove roots and surrounding their sediment

ROZIRWAN,

KHOTIMAH,

PUTRI

et al. 2024

Biodiversitas

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“…Herbarium specimens deposited in BK, BKF, and those included in the virtual herbaria of AAU ( ), BM ( ), BR ( ), CAL ( ), E ( ), G ( ), JSTOR Global Plants ( ), K (including K-W) ( ), L (including U) ( ), P ( ), The Wallich Catalogue Online ( ), US ( ), and W ( ) were examined by consulting taxonomic literature ( e.g ., Kurz, 1877 ; Henslow, 1878 ; Trimen, 1894 ; King, 1897 ; Guillaumin, 1920 ; Hou, 1958 , 1970 ; Backer & Bakhuizen van den Brink, 1963 ; McCusker, 1984 ; Qin & Boufford, 2007 ; Duke, 2010 ; Shamin-Shazwan et al, 2021 ). All herbaria acronyms follow Thiers (2023) .…”

Section: Methodsmentioning

confidence: 99%

A taxonomic revision ofRhizophoraL. (Rhizophoraceae) in Thailand

Ngernsaengsaruay,

Chanton,

Leksungnoen

et al. 2024

PeerJ

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A taxonomic revision of Rhizophora L. (Rhizophoraceae) in Thailand is presented. Two species, R. apiculata Blume and R. mucronata Poir., are enumerated with updated morphological descriptions, illustrations and a taxonomic identification key, together with notes on distributions, habitats and ecology, phenology, conservation assessments, etymology, vernacular names, uses, and specimens examined. Three names in Rhizophora, are lectotypified: R. apiculata and two associated synonyms of R. mucronata (i.e., R. latifolia Miq. and R. macrorrhiza Griff.). R. longissima Blanco, a synonym of R. mucronata, is neotypified. All two Rhizophora species have a conservation assessment of Least Concern (LC). Based on the morphological identification, these two species can be distinguished from one another by the shape and width of the leaf laminae and the length of a terminal stiff point of the leaf laminae; the type and position of the inflorescences and the number of flowers per inflorescence; the character and color of the bracteoles; the presence or absence of the flower pedicels; the shape of the mature flower buds; the shape, color, and texture of the sepals; the shape, character, and the presence or absence of hairs of the petals; the number of stamens per flower; the size of the fruits; the color and size of the hypocotyls; the color and diameter of the cotyledonous cylindrical tubes; and the color of the colleters and exudate. The thick cuticles, sunken stomata, large hypodermal cells, and cork warts are adaptive anatomical features of leaves in Rhizophora that live in the mangrove environments. The pollen grains of Thai Rhizophora species are tricolporate, prolate spheroidal or oblate spheroidal shapes, small-sized, and reticulate exine sculpturing.

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“…Plants grow these roots downward that enter the deep and tough strata of the soil. For instance, in Rhizophora mucronata , the stilt roots are strong and extensively developed, while in other species they are poorly developed such as in Rhizophora conjugate [ 41 ]. However, there are certain saline-tolerant plants with the absence of stilt roots.…”

Section: Phytomorphological Changes In Plants Grown Under Saline Cond...mentioning

confidence: 99%

Insights into the Transcriptomics of Crop Wild Relatives to Unravel the Salinity Stress Adaptive Mechanisms

Aziz

Masmoudi

2023

IJMS

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The narrow genomic diversity of modern cultivars is a major bottleneck for enhancing the crop’s salinity stress tolerance. The close relatives of modern cultivated plants, crop wild relatives (CWRs), can be a promising and sustainable resource to broaden the diversity of crops. Advances in transcriptomic technologies have revealed the untapped genetic diversity of CWRs that represents a practical gene pool for improving the plant’s adaptability to salt stress. Thus, the present study emphasizes the transcriptomics of CWRs for salinity stress tolerance. In this review, the impacts of salt stress on the plant’s physiological processes and development are overviewed, and the transcription factors (TFs) regulation of salinity stress tolerance is investigated. In addition to the molecular regulation, a brief discussion on the phytomorphological adaptation of plants under saline environments is provided. The study further highlights the availability and use of transcriptomic resources of CWR and their contribution to pangenome construction. Moreover, the utilization of CWRs’ genetic resources in the molecular breeding of crops for salinity stress tolerance is explored. Several studies have shown that cytoplasmic components such as calcium and kinases, and ion transporter genes such as Salt Overly Sensitive 1 (SOS1) and High-affinity Potassium Transporters (HKTs) are involved in the signaling of salt stress, and in mediating the distribution of excess Na+ ions within the plant cells. Recent comparative analyses of transcriptomic profiling through RNA sequencing (RNA-Seq) between the crops and their wild relatives have unraveled several TFs, stress-responsive genes, and regulatory proteins for generating salinity stress tolerance. This review specifies that the use of CWRs transcriptomics in combination with modern breeding experimental approaches such as genomic editing, de novo domestication, and speed breeding can accelerate the CWRs utilization in the breeding programs for enhancing the crop’s adaptability to saline conditions. The transcriptomic approaches optimize the crop genomes with the accumulation of favorable alleles that will be indispensable for designing salt-resilient crops.

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MORPHOLOGICAL STRUCTURES OF RHIZOPHORA APICULATA BLUME. and RHIZOPHORA MUCRONATA LAM.

Cited by 6 publications

References 0 publications

Environmental risk assessment of Pb, Cu, Zn, and Cd concentrations accumulated in selected mangrove roots and surrounding their sediment

Environmental risk assessment of Pb, Cu, Zn, and Cd concentrations accumulated in selected mangrove roots and surrounding their sediment

A taxonomic revision ofRhizophoraL. (Rhizophoraceae) in Thailand

Insights into the Transcriptomics of Crop Wild Relatives to Unravel the Salinity Stress Adaptive Mechanisms

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