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Animesh Sinha , K. G. Prasad

Abstract

Availability of first-hand basic information on Teak plantations, particularly in the NorthEast region of India, is rare. A study on variation in Teak plantations in this region has been documented and probable strategies identified for the improvement of Teak.

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Supriya Kumari , Ritesh Kumar , Sanjeev Kr. Chakrovourty , Rabish Chandra , Animesh Sinha , S. Nath

Abstract

A nursery trial has been carried out at Institute of Forest Productivity, Lalgutwa, Ranchi to assess the direct and residual effect of different growth promoting hormones (IAA, IBA, NAA and Boric Acid) individually and in combination on clonal propagation of Bambusa striata. Double node cuttings of 1 to 2 yr old culms have been used to study the shoot - ischolar_main development and rhizome genesis during propagation. Subsequent propagation of the developed BPS raised from culm segments having intact and detached (segregated by splitting) rhizome system in poly pots containing soil:sand:FYM at 2:1:1 ratio have also been studied for another 180 days. Phytohormones did not show any positive influence on ischolar_maining and rhizome genesis in culm cuttings of B. striata. Culming intensity from intact rhizome system has been slightly more than from segregated rhizome system. However, from the latter, double number of BPS of almost identical vigor can be raised within same nursery gestation period. Boric acid and combined hormone mixture have shown positive effect on new culm recruitment both in the intact and detached form of the propagules through producing more number of rhizomes. The combination of these hormones also favoured positive results in increasing culm length.

Keywords

Bambusa striata, Clonal Propagation, phytohormones, Rhizome Separation Technique

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B. N. Divakara , Animesh Sinha , Ashok Alur

Abstract

Variability studies of twenty-three candidate plus trees of M. latifolia Macb. revealed significant difference among candidate plus trees for seed traits and germination capacity. CPT-5, CPT-16 and CPT-2 recorded highest for 100-seed weight (286.27 g), oil content (51.15 %) and germination capacity (84.77 %) respectively. The phenotypic and genotypic coefficients of variations were close to each other for all traits except germination capacity. Germination capacity exhibited positive significant correlation with 100-seed weight both at genotypic (r = 0.762) and phenotypic (r = 0.548) level and 100- seed weight expressed positive significant correlation with oil content both at genotypic (r = 0.604) and phenotypic (r = 0.573) level. In conclusion, oil content and 100-seed weight are under strong genetic control hence improvement in these characters can bring improvement in germination capacity.

Keywords

Madhuca latifolia, Genetic Variability, Correlation Seed Traits

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Animesh Sinha

Abstract

Cleft grafting was attempted in Schleichera oleosa (Lour.) Oken (Syn. S. trijuga Willd). The effect of covering of scion after graft union, grafting season and tree age were evaluated for the success of graft union. Maximum success (56.7%) was recorded when all leaves were removed from scion and incense stick cover was completely sealed to prevent desiccation of scion. June monthwas found to be best time for grafting of this species in eastern part of India. However, no grafting success was observed when scion was taken from trees having more than 40 years of age.

Keywords

Grafting, Kusum, Lac Host Plant, Clonal Propagation, Incense Stick Cover

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Animesh Sinha ¹, Rameshwar Das ¹, Bibhuti Deka ¹, Syam Viswanath ¹, B. S. Chandrashekar ¹, Sandeep Chakraborty ¹

Affiliations
1 Institute of Forest Productivity, (Indian Council of Forestry Research and Education), Lalgutwa, Ranchi – 835 303, IN

Abstract

Embelia ribes Burm. f. is an important medicinal plant resource in Indian System of Medicine, Homeopathy and many other herbal products. It is mainly used as an anthelmintic, anti-diabetic, anti-fertilitic and antibacterial agent. Embelin is a characteristic chemical constituent of many species belong to the family Myrcinaceae. Among these species, seeds of Embelia ribes contain the highest content of embelin. Due to over exploitation of this species, the natural population is diminishing day by day and the adulteration has become a common feature. Hence, the problems in natural regeneration, adulteration, propagation and conservation efforts for this species are critically reviewed in the paper. Market survey revealed that E. tsjeriam-cottam was commonly sold as E. ribes. Molecular markers are being used for identification of E. ribes and to distinguish it from common substitutes and adulterants. Its natural regeneration is poor and artificial regeneration is difficult. It is a dioecious species with low male female ratio and bears short-lived male flowers as compared to female flowers. This may be the reason for less production of fruits. The in vitro technique is a promising area of research in the propagation as well as ex situ conservation of threatened plants. Very few reports are available on micropropagation of E. ribes. Again some doubts over previous report have also been observed. Therefore, the development and refinement of protocols for large scale micropropagation and conservation of authenticated plants of the species are greatly felt.

Keywords

Adulteration, Anthelmintic, Conservation, Embelin, In-vitro Propagation

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