Comparative study of various pretreatment on seed germination of Dalbergia cochinchinensis

Abstract

Dalbergia cochinchinensis belongs to family Fabaceae, is a hardwood tree species listed as vulnerable on the IUCN Red List of Threatened Species. This species is a slow-growing and it is threatened by overexploitation for its timber and illegal logging. Because of the increased demand for the timber, the species is rapidly disappearing in many habitats and threatened to extinction in the near future. Prevention of illegal logging and conservation efforts are required to protect the species. Seed germination and seedling growth is a critical step for the abiding conservation of plant germplasm. An experiment was to find out appropriate pre-sowing treatment for maximizing the germination. Eighteen pre-sowing treatments were used for both the seeds sown on moist filter paper and soil. Data was collected daily for calculated germination percentage, mean germination time, mean germination rate and growth performance. Results revealed that hot water treatment was effective to increase the germination rate comparison to the control and other treatments such as cold treatment and scarification. Significantly higher germination percentage (34.4%) and mean germination rate (0.17) were recorded in seeds were soaked in hot water 70 C for 1 min (T1). Beside, seedling growth such as number of leaves, leaf length and seedling height originated from hot water treatment performed significantly higher than others. The results indicated that seeds treated with hot water had profound and significant impact on seed germination and growth of D. cochinchinensis.

Effects of exogenous GA3 and warm water on dormancy breaking germination characteristics of Eucommia ulmoides

“…In addition, soaking seeds in warm water has the effect of softening the seed coat and increasing the permeability of the seed coat. Therefore, warm water soaking at a suitable temperature is beneficial for seed germination (Chen et al, 2017;Seng and Cheong, 2020;Yousif et al, 2020). This study confirmed that exogenous GA3 and warm water soaking treatments are beneficial to the dormancy breaking and germination of E. ulmoides seeds.…”

Effect of pre-sowing treatment on the germination and early growth of Kalappia celebica Kosterm.: an endemic and vulnerable tree species of Sulawesi, Indonesia

“…The probable reason for reduced seedling emergence might be attributed to the fact that increased temperature affected the physiological activities of the embryo of seeds. However, several studies reported that hot water treatment could improve the germination of seeds and several other plant species (Azad et al 2012;El-Sayed et al 2013;Das 2014;Suleiman et al 2018;Seng and Cheong 2020).…”

The Control of Apricot Seed Dormancy and Germination by Low Temperature Treatments

“…Several researchers working on breaking dormancy such as Rady and El-Yazal [15], Rady and El-Yazal [16] El-Yazal and Rady [17] El-Yazal et al [18] El-Yazal and Rady [19] El-Yazal and Rady [20] El-Yazal et al [21] El-Yazal et al [22] El-Yazal et al [23] El-Yazal et al [24] El-Yazal et al El-Yazal [26] on buds and Şan [1], Mark [27], Keun et al [28], Pliszko and Kostrakiewicz-Gierałt [29], Pliszko and Kostrakiewicz-Gierałt [30] Pliszko and Kostrakiewicz-Gierałt [31] Górnik et al [32] on seeds. The beneficial effect of stratification on seed germination was studied by Seng and Cheong [33] Yan and Chen [34] Guo et al [35].…”