Reproductive Biology of &lt;I&gt;Elaeocarpus blascoi&lt;/I&gt; Weibel, an Endemic and Endangered Tree Species of Palni Hills, Western Ghats, India

Ramasubbu, Raju; Irudhyaraj, D. Felix

doi:10.18520/cs/v110/i2/234-240

Cited by 13 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Physical and mechanical dormancy is the most common inhibitor of germination in many species. Threatened tree species such as Cupressus atlantica (Youssef et al 2012), Elaeocarpus blascoi Weibel (Ramasubbu and Irudhyaraj 2016) and Intsia bijuga (Colebr.) Kuntze (Thaman et al 2006) exhibit exogenous dormancy where the hard seed coats inhibit water penetration that is required for embryo growth and development.…”

Section: Discussionmentioning

confidence: 99%

“…The seeds germinate in April with the onset of rain so moisture may be a requirement for germination. The inherent stony endocarp in many members of the genus seems to be a plausible factor for poor germination (Bhuyan et al 2002;Khan et al 2003;Ramasubbu and Irudhyaraj 2016). Some studies have revealed low (1-3%) and erratic seed germination in Elaeocarpus ganitrus Roxb.…”

Section: Introductionmentioning

confidence: 99%

“…ex G.Don (Khan et al 2003) and E. japonicus Siebold (Yang et al 2001). Natural regeneration of the threatened E. blascoi was only 5% in the wild (Ramasubbu and Irudhyaraj 2016) while in E. venustus, E. serratus L and E. williamsianus Guymer, there was no germination (Saravanan et al 2011;Dahanayake et al 2013;Rossetto et al 2004). Contrastingly, some species such as E. floribundus had fairly high germination (47%) (Das 2014).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seed dormancy, germination and seedling characteristics of Elaeocarpus prunifolius Wall. ex Müll. Berol.: a threatened tree species of north-eastern India

Iralu

Upadhaya

2018

N.Z. j. of For. Sci.

View full text Add to dashboard Cite

Background: Elaeocarpus prunifolius Wall. ex Müll. Berol. is a threatened tree species of northeastern India. The present study was undertaken to investigate the type of dormancy prevailing in seeds of E. prunifolius, explore seed dormancy breaking techniques and assess seedling fitness. Methods: Ripe fruits of E. prunifolius were harvested from Jaintia hills, and seeds were subjected to various physical, manual and chemical treatments. The effect of plant growth regulators, viz gibberellic acid (GA 3) and potassium nitrate (KNO 3), were tested. Seedling vigour and survival based on seed weight were examined. Results: Germination took 6 months to initiate after seed dispersal and natural germination percentage of fresh seeds was 24%. Physical pre-germination treatments such as surface and acid scarification failed to overcome dormancy. Cracked seeds promoted germination (46%) with a mean germination time of 146 days (time to 50% germination, T 50 = 144 days). Among the GA 3 treatments, split seeds treated with GA 3 (3000 mg/L −1) yielded the highest germination (24%) with a T 50 of 55 days whereas KNO 3 did not promote germination. A combination of GA 3 and KNO 3 , however, increased the germination to 31%. Between the seed weight classes, the highest percentage of germination was observed in heavy seeds (25%) and the lowest in light seeds (20%). There was no significant variation between seed weight and germination time (p > 0.05). Seed weight had a significant effect on the shoot height, number of leaves and dry weight of seedlings (p < 0.05). Conclusion: Based on the seed tests, E. prunifolius seeds exhibits 'combined' dormancy (physical and physiological) as splitting seed coat and application of GA 3 effectively broke dormancy. Splitting the seed coat is a cost-effective method for accelerating germination of seeds. Heavyweight seeds produced better performing seedlings compared to their counterparts which may be viewed as an important reproductive strategy of the species.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seed dormancy, germination and seedling characteristics of Elaeocarpus prunifolius Wall. ex Müll. Berol.: a threatened tree species of north-eastern India

Iralu

Upadhaya

2018

N.Z. j. of For. Sci.

View full text Add to dashboard Cite

show abstract

“…While these have been reported in a few publications, details are incomplete or seem to have been omitted (Stewart & Balcar 2003, 2008Ramasubbu & Irudhayaraj 2016). Two publications claim rediscovery of the species (Vijayan et al 2011;Irudhayaraj & Ramasubbu 2014), indeed, of the exact same tree, though our efforts have previously been published (Stewart & Balcar 2003, 2008.…”

Section: Records Of Thementioning

confidence: 95%

<b>Records of the Palni Hills Rudraksha Tree <I>Elaeocarpus blascoi</I> (Oxalidales Elaeocarpaceae) in Palni Hills, Tamil Nadu, India</b>

Stewart¹,

Balcar²

2017

J. Threat. Taxa

View full text Add to dashboard Cite

Elaeocarpus blascoi is an endemic tree species reported only from the Palni Hills in the Western Ghats of Tamil Nadu. It was described from one tree in 1972, and was thought to be extinct till 1999. We had germinated an unidentified plant species in 1990, and this was later identified in 2001 as E. blascoi upon discovery of a mature tree in Vattakanal shola. We describe here the discovery of the mature tree and two of our plantings that have survived over the past 20 years. Our discovery and plantings have been written about in other publications but with partial information. In this note we list out all our experience with this species to provide clarity.

show abstract

“…Moreover, the phylogenetic relationship between Elaeocarpus species are poorly understood, and only a few molecular studies have been undertaken so far, with the number of loci and taxon sample being limited (Prasannan et al, 2020). In addition, some of the taxonomic studies carried out in the past (Irudhayaraj & Ramasubbu, 2014; Irudhyaraj & Ramasubbu, 2017; Meijer, 1995; Murti, 1993; Ramamoorthy, 1976; Ramasubbu & Irudhyaraj, 2016; Saldanha, 1984; Vijayan, 2017) had also assisted in the identification of the genus in the Indian subcontinent. However, problems of nomenclature, typification, species delimitation, and species identification, with many of these issues have been arising from the citation of incorrectly identified materials.…”

Section: Introductionmentioning

confidence: 99%

Comparative vegetative anatomy of three Elaeocarpus species from the Western Ghats, Southern India

Yuvarani

Karthik

Ravi

et al. 2022

Microscopy Res & Technique

View full text Add to dashboard Cite

The vegetative anatomy of Elaeocarpus angustifolius Blume, Elaeocarpus tuberculatus Roxb., and Elaeocarpus variabilis Zmarzty were investigated to illustrate anatomical variations. Plant materials were free-hand sectioned using a razor blade and stained with different staining solutions. The maceration technique was used to assess stomatal characteristics. Elaeocarpus leaves have abaxial epidermis with paracytic stomata and curved anticlinal walls in E. angustifolius, straight walls in other two species. Trichomes were absent in E. angustifolius.hav Mesophyll dorsiventral, midvein cortex contains starch grains, and vascular tissues enclosed by thick-walled sclerenchymatous cells. The petioles of all the three species possess unicellular epidermal hairs, collenchymatous hypodermis, and cortex containing druses and crystals, and vascular tissue enclosed by sclerenchymatous fibers. Water-storage cells are absent in petioles of E. angustifolius. Anatomical features of Elaeocarpus stem include epidermal hairs, epidermis covered by thin cuticle, the collenchymatous hypodermis and vascular integrity with entire cylinder enclosed by sclerenchymatous fibers. Pith contains water-storage cells. Starch grains absent in the pith cells of E. tuberculatus. The roots of Elaeocarpus possess unicellular root hairs, cortex 12-14 layered in E. tuberculatus and E. variabilis and 10-12 layerd E. angustifolius, Endodermis O-thickened and pericycle single-layered in all the examined Elaeocarpus species. Vascular bundles are arranged radially. Lignin deposition occurred in stellar region of roots. Water-storage cells present in the stelar regions of E. variabilis.The study revealed significant anatomical differences between the three Elaeocarpus species and most of these anatomical features may be used as markers for the identification of these species. Research Highlights• Comparative anatomy of three south Indian Elaeocarpus was studied.• Leaf mesophyll layers varied in all the Elaeocarpus species.• Crystals was present in petiole of all examined Elaeocarpus species.• Starch grains was absent in stems of E. tubercuatus, but present in E. variabilis.• Water-storage cells observed in stellar region of E. variabilis.

show abstract

Reproductive Biology of <I>Elaeocarpus blascoi</I> Weibel, an Endemic and Endangered Tree Species of Palni Hills, Western Ghats, India

Abstract: effects of Batawali (Tinospora tuberculata) on germination and seedling growth of plants.

Cited by 13 publications

References 10 publications

Seed dormancy, germination and seedling characteristics of Elaeocarpus prunifolius Wall. ex Müll. Berol.: a threatened tree species of north-eastern India

Seed dormancy, germination and seedling characteristics of Elaeocarpus prunifolius Wall. ex Müll. Berol.: a threatened tree species of north-eastern India

<b>Records of the Palni Hills Rudraksha Tree <I>Elaeocarpus blascoi</I> (Oxalidales Elaeocarpaceae) in Palni Hills, Tamil Nadu, India</b>

Comparative vegetative anatomy of three Elaeocarpus species from the Western Ghats, Southern India

Contact Info

Product

Resources

About