A new species of Syzygium (Myrtaceae) from Kerala, India

Shareef, S.M.; Sandeep, K.; Roy, P.E.

doi:10.11646/phytotaxa.129.1.2

Cited by 596 publications

(6 citation statements)

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“…Among the documented species in the genus of Syzygium, there are considerable differences in the shape and size of their seeds (WCSP, 2021). The larger sized seeds have diameters in the range of 15 to 35 mm whilst others are small with diameter comparable to that of S. myrtifolium (Shareef et al, 2013;Sujanapal et al, 2013;Mohamed et al, 2014;Karuppusamy and Ravichandran, 2016;Snow et al, 2016). In connection with desiccation tolerance, the seeds of only a limited number of species in this genus have been investigated.…”

Section: Discussionmentioning

confidence: 99%

Fruit Ripeness Effects on Characteristics, Germination and Desiccation Tolerance of Syzygium myrtifolium Walp. Seeds

Fui Ying Tsan,

Nur Farhanis Awang

2021

JTPP

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To plant Syzygium myrtifolium Walp. on harsh urban sites, planting materials of seed origin having better developed tap roots are preferred compared to those propagated from stem cuttings. However, fully ripe fruits at 8 weeks after fruit set are heavily lost to birds. In the current study, the unpalatable semi-ripe fruits at 7 weeks were found suitable for propagation. The seeds from the semi-ripe fruits showed mean germination rate of 93% and developed normal seedlings within 1 week, although continued growth with increases in size and fresh weight (FW) in the fruits and seeds was significant towards completion of fruit ripening. Thus, harvesting of fruits within the short period between these two fruit developmental phases is critical in the seed procurement process of this plant species. At the semi-ripe stage, pericarp exhibiting mixture of red and black colour can be a practical guide to indicate the suitable time for harvesting the fruits. Nonetheless, subsequent desiccation trial aimed to determine the storability of the seeds at postharvest found that the seeds obtained from both the semi-ripe and fully ripe fruits had drastic loss of germinability at seed moisture content of approximately 0.3 g H2O/g FW. Storage of the seeds above this relatively high moisture level for future planting was detrimental because the seeds age rapidly when they remain metabolically active with high respiration rates. Microbial infestation will also be an added problem during seed storage. Therefore, the seeds need to be sown fresh.

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Section: Discussionmentioning

confidence: 99%

Fruit Ripeness Effects on Characteristics, Germination and Desiccation Tolerance of Syzygium myrtifolium Walp. Seeds

Fui Ying Tsan,

Nur Farhanis Awang

2021

JTPP

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“…The newer figures are derived from recent study (primarily by JWB) of approximately forty-thousand herbarium specimens of Syzygium from across its geographical range, but especially of specimens from Malesia. The increased estimate also stems partially from newly described species (e.g., Shareef et al 2012Shareef et al , 2013Shareef et al , 2014Byng et al, 2015Byng, 2016 ;Byng & Pahladsingh, 2016 ; ; and others cited in Snow et al, 2016), many known but undescribed species (Snow & Byng, unpubl. data), and those transferred here from Piliocalyx Brongn.…”

Section: Introductionmentioning

confidence: 98%

New Caledonian Piliocalyx transferred to Syzygium (Myrtaceae) with an updated conspectus of the species

Snow,

Byng,

Munzinger

et al. 2017

Candollea

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Members of Piliocalyx Brongn. & Gris (Myrtaceae) from New Caledonia are transferred to, or given new names in, Syzygium Gaertn., including : Syzygium baudouinii (Brongn. & Gris) N. Snow, Byng & J.W. Dawson, Syzygium bullatum (Brongn. & Gris) N. Snow & Byng, Syzygium francii (Guillaumin) N. Snow, Byng & Munzinger, Syzygium ignambiense (Baker f.) N. Snow & Byng, Syzygium neoeugenioides (Guillaumin) N. Snow, Byng & J. W. Dawson, Syzygium neolaurifolium N. Snow & Byng, and Syzygium vieillardii N. Snow, Callm. & Byng. Diagnostic characters for all species, including Syzygium lifuanum Däniker and Syzygium viriosum Craven & Dawson, and a list of specimens confirmed for each species is included. Lectotypes are designated for Syzygium baudouinii, Syzygium bullatum, Syzygium neoeugenioides, Syzygium neolaurifolium, and Syzygium viriosum. Field photographs are provided for five of the species. Résumé

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“…Within the genus of Syzygium which consists of possibly 1,200 shrubs and trees in the tropical and subtropical countries in Africa, and throughout the Southeast Asia region, the fruit and seed characters are among the important evidences in the cladistic studies and reviews of this large genus (Lughadha & Proença, 1996;Landrum & Kawasaki, 1997;Staggemeier et al, 2010;Sivasubramaniam & Selvarani, 2012;Nair et al, 2020, WCSP, 2021. Many seeds of Syzygium contain multiple embryos within their seed coat (Thurlby et al, 2011, Blando et al, 2013Shareef et al, 2013, Sujanapal et al, 2013, Mohamed et al, 2014, Karuppusamy & Ravichandran, 2016, Snow et al, 2016. However, S. myrtifolium seed has no visible embryonic axis when it is shed from tree (Tsan & Awang, 2021).…”

Section: Introductionmentioning

confidence: 99%

Regeneration of Syzygium myrtifolium Walp. from Seed Fragments – Evidence of Polyembryony?

Tsan

2023

MAB

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Intact Syzygium myrtifolium seed produces a single seedling although most species within the same genus are polyembryonic. Following the earlier work that found the potential of more than one plantlet development from the fractionated seeds of some monoembryonic Eugenia spp. belonging to the same family, the present work assessed the sprouting of S. myrtifolium seed fractions on moistened paper towel pads. This study was carried out in the enclosed plastic boxes at ambient temperature in the laboratory. The results obtained indicated that the different parts of the cotyledons could develop plantlets spontaneously following incision of a seed into separated fractions. Despite the reduced mass, the seed fragments revealed the potential of developing more than one plantlet in vivo from a seed. Injury or seed incision has been suggested to trigger the development of embryonic cell in the cotyledon leading to the formation of an entire plant in contrast to polarity committed by whole seed. For the fragmented seeds that did not regenerate full plants, more than 80% of them exhibited unsynchronized adventitious root development. In the re-growth evaluation, more than 70% of the seed fragments formed new adventitious roots on the new cotyledonary surfaces after the removal of plantlets and the attached cotyledons. This phenomenon suggests the spread of meristematic tissues within the cotyledons. Future work should look into the intrinsic signals and external cues that regulate the cellular differentiation and development in the seed fractions in revealing the polyembryony in S. myrtifolium.

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A new species of Syzygium (Myrtaceae) from Kerala, India

Cited by 596 publications

References 0 publications

Fruit Ripeness Effects on Characteristics, Germination and Desiccation Tolerance of Syzygium myrtifolium Walp. Seeds

Fruit Ripeness Effects on Characteristics, Germination and Desiccation Tolerance of Syzygium myrtifolium Walp. Seeds

New Caledonian Piliocalyx transferred to Syzygium (Myrtaceae) with an updated conspectus of the species

Regeneration of Syzygium myrtifolium Walp. from Seed Fragments – Evidence of Polyembryony?

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