Effect of light and temperature on seed germination of selected African leafy vegetables

Motsa, Mlamuli M.; Slabbert, M.M.; Averbeke, W. Van; Morey, Liesl

doi:10.1016/j.sajb.2015.03.185

Cited by 56 publications

(43 citation statements)

References 27 publications

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“…In condition (i) and (ii) the light (60 μ/mol/m −2 s), temperature (25 ± 2°C), relative humidity (60 ± 5%), and photoperiod (16 h light/8 h darkness), however, condition (iii) received fluctuating temperature (−1°C-30°C), relative humidity (80-40%) during night and daytime and low daylight intensity (45 μ/mol/m −2 s). Seed germination and emergence are temperature dependent, and light intensity positively influences the seed germination [33]. The results of present study are close agreement with the results of Motsa et al [33] in which seed germination response of 80 African leafy vegetables was studied.…”

Section: Effect Of Ga 3 Treatmentssupporting

confidence: 92%

“…Seed germination and emergence are temperature dependent, and light intensity positively influences the seed germination [33]. The results of present study are close agreement with the results of Motsa et al [33] in which seed germination response of 80 African leafy vegetables was studied.…”

Section: Effect Of Ga 3 Treatmentssupporting

confidence: 92%

“…Properly germinated seeds of all conditions were acclimatized gradually, and for acclimatization, seedlings were initially kept under greenhouse for 6 months [Plate 1f], and finally, well-developed plantlets were planted in the departmental garden facing direct sunlight. Studies are available regarding the synergistic influence of variables such as changing light and temperature during day and night [30,33]; light, chilling and GA 3 [31]; and GA 3 , light and catalase activity [32] are available which supports the preeminence of synergistic influence of GA 3 treatments Ex situ conservation through micropropagation of species like O. indicum is difficult due to a high degree of callusing at the basal end, high phenolic excretion into the medium and consequent blackening of explants. Seeds are best sources for natural regeneration of angiosperm plants [34], but seed abortion and self-incompatibility in pollination are major constraints in natural regeneration of O. indicum [35].…”

Section: Synergistic Influence Of Ga 3 and Sowing Conditionsmentioning

confidence: 99%

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Effect of GA3 treatments and sowing conditions on ex situ seed germination of Oroxylum indicum (L) Benth. Ex Kurz: A threatened high value medicinal plant

2018

J App Biol Biotech

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The objective of this study was to observe the effect of pre-sowing treatments of gibberellic acid (GA 3 ) and different sowing conditions on ex situ seed germination of Oroxylum indicum. For this, after pre-sowing treatments, seeds were subjected to three different conditions for their germination. Results revealed that only GA 3 treatments have no significantly different (P < 0.5) influence, on seed germination, to control. However, sowing conditions have significant (P < 0.5) influences on seed germination, and condition i (in vitro) found most suitable for the seed germination. Further, the synergistic influence of treatments and sowing conditions significantly (P < 0.5) enhanced the germinationwith rate. The 100 ± 00% seed germination within 7.92 ± 0.58 days having 10.5 ± 0.76 cm seedling height, and 1050 ± 76.38 seedling vigor was recorded in seeds treated with 50 µM GA 3 for 24h and placed under condition (i). Well-developed seedlings were planted in the departmental garden with 90% survival rate. This effort will be helpful for the conservation of this endangered and high-value medicinal tree through ex situ reforestation programs, and to harness its potential sustainably.

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Section: Effect Of Ga 3 Treatmentssupporting

confidence: 92%

Section: Effect Of Ga 3 Treatmentssupporting

confidence: 92%

Section: Synergistic Influence Of Ga 3 and Sowing Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of GA3 treatments and sowing conditions on ex situ seed germination of Oroxylum indicum (L) Benth. Ex Kurz: A threatened high value medicinal plant

2018

J App Biol Biotech

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“…In the life cycle of a plant, seeds have the highest resistance to extreme environmental stresses (Motsa, Slabbert, van Averbeke, & Morey, ). Successful establishment of a plant population is dependent on the adaptive aspects of seed germination (Qu, Huang, Baskin, & Baskin, ).…”

Section: Discussionmentioning

confidence: 99%

Phylogeny, habitat together with biological and ecological factors can influence germination of 36 subalpine Rhododendron species from the eastern Tibetan Plateau

Wang

Lai

et al. 2018

Ecology and Evolution

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The reproductive stages of the life cycle are crucial in explaining the distribution patterns of plant species because of their extreme vulnerability to environmental conditions. Despite reported evidence that seed germination is related to habitat macroclimatic characteristics, such as mean annual temperature, the effect of this trait in controlling plant species distribution has not yet been systematically and quantitatively evaluated. To learn whether seed germination can predict species distribution along altitude gradients, we examined germination data of 36 Rhododendron species in southeastern Tibet originating from contrasting altitudes, habitats, plant heights, seed masses, and phylogenies. Germination varied significantly with altitude, habitat, plant height, and phylogeny and was higher in the light than in the dark. Germination percentage was highest at 10:20°C in the light and 15:25°C in the dark. As altitude increased, germination percentages first rose and then decreased, being highest at 3,500–4,000 m. Germination percentage and rate were highest on rocky slopes, increasing as seed mass and plant height rose. Variations in germination percentage and rate were not significant at subgenera, section, and subsection levels, but they were significant at species level. The results suggested that the relationship between germination and altitude may provide insights into species distribution patterns. Further, germination patterns are a result of long‐term evolution as well as taxonomic constraints.

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“…This will strongly affect the rate at which species can expand their ranges and adapt to new geographical areas. Another factor could be that the seeds were not germinated at optimal temperature since plants species have different cardinal temperatures at which germination occurs (Motsa, Slabbert, Van Averbeke, & Morey, 2015). However, germination at temperature (19 °C) may be within the limits of Cyclopia germination since Koen et al (2016) reported highest seed germination of Cyclopia at 15 °C.…”

Section: Germination Variation Between Cultivated and Wild Speciesmentioning

confidence: 99%

Natural Fecundity and Germination Characteristics of Selected Cyclopia (Honeybush) Species: Preliminary Findings

Motsa¹,

Bester²,

Slabbert³

et al. 2017

JAS

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Cyclopia Vent. (honeybush) is a South African herbal tea legume endemic to the Cape Floristic Region of South Africa. At present, knowledge of reproductive fitness (fecundity) between cultivated and undomesticated Cyclopia species is scant. Cultivated genotypes of C. genistoides (L.) R.Br. and C. subternata Vogel were evaluated for their potential to produce fruit and seeds in different localities spanning two years. Fecundity and germination were also determined from natural environment of each species and compared to cultivated species in order to determine the variation between species and between cultivated and non-cultivated species. Seeds collected were weighed to determined seed mass and evaluated for germination rate and cumulative germination per individual site. A fifth of flowers developing into a pod, averaged more initiated and filled seeds per pod in C. subternata than C. genistoides. Germination percentage was directly proportional to rate of germination in both species. Cyclopia subternata had a higher fecundity and germination than C. genistoides in both cultivated and natural environments. The study results assist in the further improvement of the genus through breeding new cultivars for seed with desired qualities for improving commercial characteristics; planning of seed orchards for seed production, selecting of best sites, assisting in choosing progenies for seed production and rehabilitation of degraded sites for the sustainable production of honeybush.

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Effect of light and temperature on seed germination of selected African leafy vegetables

Cited by 56 publications

References 27 publications

Effect of GA3 treatments and sowing conditions on ex situ seed germination of Oroxylum indicum (L) Benth. Ex Kurz: A threatened high value medicinal plant

Effect of GA3 treatments and sowing conditions on ex situ seed germination of Oroxylum indicum (L) Benth. Ex Kurz: A threatened high value medicinal plant

Phylogeny, habitat together with biological and ecological factors can influence germination of 36 subalpine Rhododendron species from the eastern Tibetan Plateau

Natural Fecundity and Germination Characteristics of Selected Cyclopia (Honeybush) Species: Preliminary Findings

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