Phyllanthus kaweesakiiPornp., Chantar. & J.Parn. sp. nov. is newly described from the limestone mountain ridges in the northeast of Thailand. Comparison of morphology, anatomy, pollen morphology, and DNA sequences of this species with the most similar existing species P. mirabilis Müll.Arg. was undertaken. The results indicated that the two taxa are different in morphology, especially habit, stem base, and inflorescence, but that their pollen morphology and anatomy are similar. The molecular phylogenetic analysis, based on sequences of the plastid matK and nuclear ribosomal ITS regions, supported separation of the two taxa. This new species is described and illustrated, and its conservation status is discussed.
ETYMOLOGY: The name of this species honours the Thai biologist, Kaweesak Keeratikiat, who first discovered the plants.
VERNACULAR: Ma Yom Pha, มะยมผา.
DISTRIBUTION: Currently known only from the type location; North-eastern THAILAND.
ECOLOGY: On open limestone ridges, ca. 440 m a.s.l. Flowering period June to September, fruiting period August to September.
Pimwadee Pornpongrungrueng, John A.N. Parnell, Trevor R. Hodkinson and Pranom Chantaranothai. 2017. Phyllanthus kaweesakii (Phyllanthaceae), A New Species from Thailand. Botany.95(6): 567-577: DOI: 10.1139/cjb-2016-0298
มะยมหินชนิดใหม่ของโลก Phyllanthus kaweesakii Pornp., Chantar. & J.Parn. (Phyllanthaceae), a new species from Thailand ตั้งชื่อชนิดเป็นเกียรติให้แก่ผู้ค้นพบและเก็บตัวอย่าง นายกวีศักดิ์ กีรติเกียรติ ประกาศตีพิมพ์เป็นพืชชนิดใหม่ ปี 2017
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
Based on morphological studies performed on live plants in the field and specimens deposited in herbaria, a new species, Glochidion shanense Gang Yao & Shixiao Luo (Phyllantheae, Phyllanthaceae), is here described and illustrated. The species is morphologically most similar to G. ellipticum Wight, but can be distinguished from the latter by having hairy branchlets, longer pedicels, uniseriate and narrowly triangular sepals of female flowers, 4–5-locular ovaries, stout and cylindric persistent style on fruits.
Figure 2. Morphological comparisons between Glochidion ellipticum Wight (B, C, E, H) and Glochidion shanense Gang Yao & Shixiao Luo (A, D, F, G). A, B, D, E Female flower C, F Branchlets G, H Fruit.
Glochidion shanense Gang Yao & Shixiao Luo, sp. nov.
Diagnosis: The species is similar to G. ellipticum Wight in morphology, but differs from the latter by its branchlets pubescent, pedicels of female flowers 1.5–2 mm long, sepals of female flowers uniseriate and narrowly triangular, apex of style truncate slightly, persistent style of fruit stout and cylindric.
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Distribution and habitat: This new species is currently known only from its type locality, Shan State, eastern Myanmar, where it grows in the broadleaved and coniferous dry forest dominated by Docynia indica (Wall.) Decne., Schimawallichii (DC.) Korth. and Pinus species.
Etymology: Glochidion shanense is named after its type locality, Shan State in eastern Myanmar.
Gang Yao, Jie Cai, Youheng Wu, Xuefei Yang, Thaung Naing Oo, Aung Zaw Moe and Shixiao Luo. 2018. Taxonomic Studies of Glochidion (Phyllanthaceae) from the Indo-China Peninsula (I): G. shanense, A New Species from Myanmar. PhytoKeys. 96: 57-62. DOI: 10.3897/phytokeys.96.24497
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
Background: Nickel hyperaccumulator plants are of much interest for their evolution and unique ecophysiology, and also for potential applications in agromining—a novel technology that uses plants to extract valuable metals from soil. The majority of nickel hyperaccumulators are known from ultramafc soils in tropical regions (Cuba, New Caledonia and Southeast Asia), and one genus, Phyllanthus (Phyllanthaceae), is globally the most represented taxonomic entity. A number of tropical Phyllanthus-species have the potential to be used as ‘metal crops’ in agromining operations mainly because of their ease in cultivation and their ability to attain high nickel concentrations and biomass yields.
Results: One of the most promising species globally for agromining, is the here newly described species Phyllanthus rufuschaneyi. This species can be classifed in subgenus Gomphidium on account of its staminate nectar disc and pistillate entire style and represents the most western species of this diverse group. The fower structure indicates that this species is probably pollinated by Epicephala moths.
Conclusions: Phyllanthus rufuschaneyi is an extremely rare taxon in the wild, restricted to Lompoyou Hill near Kinabalu Park in Sabah, Malaysia. Its utilization in agromining will be a mechanism for conservation of the taxon, and highlights the importance of habitat and germplasm preservation if rare species are to be used in novel green technologies.
Keywords: Epicephala pollination, Nickel hyperaccumulation, Phyllanthaceae, Phyllanthus subgenus Gomphidium, Sabah
Fig. 2 Detail of Phyllanthus rufuschaneyi plants. a Inflorescences of P. rufuschaneyi, note the difference between main stem and side stem with at the base small structures that signal phyllanthoid branching; b fruit capsules of P. rufuschaneyi. Images by A. van der Ent
Fig. 3Phyllanthus rufuschaneyi Welzen, R.W.Bouman & Ent: a a branch with only scars of cataphylls and cataphyllary stipules present at the base of branchlets as these are caducous (drawn from herbarium specimen with leaves glued sideways and staminate flowers sometimes upright instead of hanging); b detail of sidebranch with leaves and staminate flowers in natural position; c staminate flower; d staminate flower with part of sepals removed showing disc glands and androecium; e pistillate flower; f pistillate flower with part of sepals removed showing disc glands and ovary; g fruit
(a, c, d Daim Endau 225; b Lomudin Tadon g257; e, f SNP 32987; g Lomudin Tadon 257; all SNP). Drawing by Esmée Winkel (2017)
Phyllanthus rufuschaneyi Welzen, R.W.Bouman and Ent, sp. nov.
—TYPE: MALAYSIA. Sabah, near Kampong Nalumad, eastern boundary Kinabalu Park, Lompoyou Hill, Antony Van der Ent et al. SNP 32987! (holo SNP; iso L).
Paratype: SNP 22039!, Lompoyou Hill, Sabah, Malaysia (Figs. 2, 3, 4).
This species is most similar to P. securinegoides from the Philippines, from which it can be distinguished by its smaller leaves, staminate fowers with connate flaments and pistillate fowers with connate tubular stigmas
Etymology: The specific epithet “rufuschaneyi” honours Dr. Rufus L. Chaney (b. 1942), an agronomist who is widely credited for inventing phytomining (agromining) (Chaney 1983), leading to the technology being patented (Chaney et al. 1998). Dr. Chaney has worked for 47 years at the USDA Agricultural Research Service (USA) on risk assessment for metals in soils and crops, and the food-chain transfer and bioavailability of soil and crop metals to humans. He published over 490 publications and won the Gordon Award for Lifetime Achievement and Excellence in Phytoremediation Research. The fact that P. rufuschaneyi is the most promising tropical Ni ‘metal crop’ presently known, makes this recognition fitting.
Distribution, habitat and ecology: Phyllanthus rufuschaneyi is known only from two populations; one (very small) population at the foot of Bukit Hampuan, and another larger population on Lompoyou Hill approximately 5 km from the first population. The habitat in both localities is open secondary scrub that has been affected by recurring forest fires (Fig. 1). Lompoyou Hill is close to the villages of Nalumad and Pahu. The hill (400 m asl) has been burnt at least once as a result of an uncontrolled forest fire in 1998. Prior to burning, the site was already disturbed by logging. The area has a short and open scrub community (dominated by shrubs 1–3 m tall) with pioneer species such as Macaranga kinabaluensis Airy Shaw (Euphorbiaceae). In this habitat type several other Ni hyperaccumulator plant species occur, including Phyllanthus balgooyi, Actephila alanbakeri, Mischocarpus sundaicus Blume (Sapindaceae), and Xylosma luzonensis Clos (Salicaceae). The local conditions are xeric, and the soils are shallow and heavily eroded with limited amounts of organic matter. In pot experiments P. rufuschaneyi responded negatively to increasing organic matter amendments (Nkrumah et al. 2017). Phyllanthus rufuschaneyi occurs exclusively on these young eroded soils (hypermagnesian Cambisols) that occur at low elevation (700 m asl) on strongly serpentinised bedrock. These soils have extremely high magnesium (Mg) to calcium (Ca), circum-neutral pH, and high available Ni as a result of the disintegration of phyllosilicates and re-sorption onto secondary iron (Fe)-oxides or high-charge clays (Echevarria 2018). In Sabah, Ni hyperaccumulator plant species are restricted to these soils with a pH > 6.3 and relatively high total soil Ni concentrations > 630 μg g−1 (Van der Ent et al. 2016b).
Roderick Bouman, Peter van Welzen, Sukaibin Sumail , Guillaume Echevarria, Peter D. Erskine and Antony van der Ent. 2018. Phyllanthus rufuschaneyi: A New Nickel Hyperaccumulator from Sabah (Borneo Island) with Potential for Tropical Agromining. Botanical Studies: An International Journal. 59:9. DOI: 10.1186/s40529-018-0225-y
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
