Seed germinability and longevity influences regeneration of Acacia gerrardii

Plant Ecology ◽  
2018 ◽  
Vol 219 (5) ◽  
pp. 591-609 ◽  
Author(s):  
Majda K. Suleiman ◽  
Kingsley Dixon ◽  
Lucy Commander ◽  
Paul Nevill ◽  
Narayana R. Bhat ◽  
...  
Keyword(s):  
Seed Germinability ◽  
Acacia Gerrardii

A Simple Technique for Seed Transfer in X-ray Analysis of Seed

1974 ◽  
Vol 4 (3) ◽  
pp. 407-409
Author(s):  
B. S. P. Wang
Keyword(s):  
Simple Technique ◽  
Seedling Vigor ◽  
X Ray ◽  
Seed Germinability ◽  
Seed Transfer ◽  
Follow Up Study ◽  
Germinating Seeds ◽  
Tree Seed

Using X-radiography both for the follow-up study of germination and the correlation of tree seed germinability with embryo and endosperm (or megagametophyte) development often involve seed transfer by hand. Such a procedure is tedious and time-consuming and errors of seed displacement occur frequently. Conventional germination procedures also make counting germinants and evaluating seedling vigor difficult due to the shifting of positions of germinating seeds. A simple technique of using a combination of mechanized vacuum counting plate and perforated Plexiglas templates was devised to overcome these difficulties. It decreased by 40 times the time needed to transfer 400 seeds by hand. It also reduced errors of seed displacement.

Germination strategies under climate change scenarios along an aridity gradient

2020 ◽  
Vol 13 (4) ◽  
pp. 470-477
Author(s):  
Alexander Zogas ◽  
Evsey Kosman ◽  
Marcelo Sternberg
Keyword(s):  
Climate Change ◽  
Seed Banks ◽  
Arid Ecosystems ◽  
Annual Rainfall ◽  
Strong Impact ◽  
Climate Change Scenarios ◽  
Aridity Gradient ◽  
Soil Seed Banks ◽  
Seed Germinability ◽  
Semi Arid

Abstract Aims Climate change in the eastern Mediterranean region will have a strong impact on ecosystem functioning and plant community dynamics due to a reduction in annual rainfall and increased variability. We aim to understand the role of seed banks as potential buffers against climatic uncertainty determined by climate change. Methods We examined germination strategies of 18 common species present along an aridity gradient. Data were obtained from soil seed banks germinated during nine consecutive years from arid, semi-arid, Mediterranean and mesic Mediterranean ecosystems. At the semi-arid and Mediterranean sites, rainfall manipulations simulating 30% drought and 30% rainfall increase were applied. Germination strategies were tested under optimal irrigation conditions during three consecutive germination seasons to determine overall seed germinability in each soil sample. Changes in germination strategy were examined using a novel statistical approach that considers the climatic and biotic factors that may affect seed germinability. Important Findings The results showed that dominant species controlled their germination fractions by producing seeds with a different yearly germination fraction probability. The amount of rainfall under which the seeds were produced led to two major seed types with respect to germinability: high germinability, seeds leading to transient seed banks, and low germinability, seeds leading to persistent seed banks. We conclude that differential seed production among wet and dry years of both seed types creates a stable balance along the aridity gradient, enabling the soil seed bank to serve as a stabilizing mechanism buffering against rainfall unpredictability. Additionally, we present a general model of germination strategies of dominant annual species in Mediterranean and arid ecosystems that strengthens the notion of soil seed banks as buffers against climatic uncertainty induced by climate change in the region.

scholarly journals In vitro antimicrobial activities of Saudi honeys originating from Ziziphus spina‐christi L. and Acacia gerrardii Benth. trees

2019 ◽  
Vol 8 (1) ◽  
pp. 390-401 ◽  
Author(s):  
Ayman A. Owayss ◽  
Khaled Elbanna ◽  
Javaid Iqbal ◽  
Hussein H. Abulreesh ◽  
Sameer R. Organji ◽  
...  
Keyword(s):  
Antimicrobial Activities ◽  
Acacia Gerrardii

scholarly journals Induction of Osmoregulation and Modulation of Salt Stress inAcacia gerrardiiBenth. by Arbuscular Mycorrhizal Fungi andBacillus subtilis(BERA 71)

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Abeer Hashem ◽  
E. F. Abd_Allah ◽  
A. A. Alqarawi ◽  
A. A. Al-Huqail ◽  
M. A. Shah
Keyword(s):  
Salt Stress ◽  
Arbuscular Mycorrhizal Fungi ◽  
Glycine Betaine ◽  
Mycorrhizal Fungi ◽  
Plant Stress ◽  
Arbuscular Mycorrhizal ◽  
Systemic Resistance ◽  
Plant Growth Promoting ◽  
Acacia Gerrardii

The role of soil microbiota in plant stress management, though speculated a lot, is still far from being completely understood. We conducted a greenhouse experiment to examine synergistic impact of plant growth promoting rhizobacterium,Bacillus subtilis(BERA 71), and arbuscular mycorrhizal fungi (AMF) (Claroideoglomus etunicatum;Rhizophagus intraradices; andFunneliformis mosseae) to induce acquired systemic resistance in Talh tree (Acacia gerrardiiBenth.) against adverse impact of salt stress. Compared to the control, the BERA 71 treatment significantly enhanced root colonization intensity by AMF, in both presence and absence of salt. We also found positive synergistic interaction betweenB.subtilisand AMFvis-a-visimprovement in the nutritional value in terms of increase in total lipids, phenols, and fiber content. The AMF and BERA 71 inoculated plants showed increased content of osmoprotectants such as glycine, betaine, and proline, though lipid peroxidation was reduced probably as a mechanism of salt tolerance. Furthermore, the application of bioinoculants to Talh tree turned out to be potentially beneficial in ameliorating the deleterious impact of salinity on plant metabolism, probably by modulating the osmoregulatory system (glycine betaine, proline, and phenols) and antioxidant enzymes system (SOD, CAT, POD, GR, APX, DHAR, MDAHR, and GSNOR).

Changes in inorganic phosphate and seed germinability during afterripening of wild oats

1984 ◽  
Vol 62 (11) ◽  
pp. 2469-2471 ◽  
Author(s):  
William A. Quick ◽  
Andrew I. Hsiao
Keyword(s):  
Environmental History ◽  
Inorganic Phosphate ◽  
Room Temperature ◽  
Avena Fatua ◽  
Steady Increase ◽  
Wild Oat ◽  
Seed Germinability ◽  
Wild Oats

The period of afterripening required by dormant seeds of wild oat (Avena fatua L.) depends upon their genetic and environmental history. A steady increase was found in the level of inorganic phosphate (Pi) and germinability of dry mature caryopses of genetically dormant wild oat lines as afterripening progressed. There were no appreciable changes in Pi or in germinability of the companion seeds stored at −15 °C over the period of study. Secondary seeds were more dormant and had lower levels of Pi during afterripening than was the case with primary seeds. Storage at room temperature had little effect on Pi level of nondormant seed line. Results support the hypothesis that levels of endogenous Pi within the seed influence germinability.

Variation in pre-harvest sprouting tolerance and fresh seed germination in mungbean (Vigna radiata L.) genotypes

2017 ◽  
Vol 16 (5) ◽  
pp. 437-445 ◽  
Author(s):  
Amrit Lamichaney ◽  
Pradip Kumar Katiyar ◽  
Vijay Laxmi ◽  
Aditya Pratap
Keyword(s):  
Seed Germination ◽  
Seed Dormancy ◽  
Vigna Radiata ◽  
Biochemical Marker ◽  
Amylase Activity ◽  
Seed Germinability ◽  
Fresh Seed ◽  
Improvement Programme

AbstractMungbean seeds, despite being protected inside the pod, are susceptible to pre-harvest sprouting (PHS) following rainfall due to lack of fresh seed dormancy (FSD), which deteriorates the quality of the seed/grain produced. Therefore, development of mungbean cultivars with short (10–15 days) period of FSD has become important to curtail losses incurred by PHS. In this study, we investigated variations in PHS, fresh seed germination (FSG) and activity of α-amylase enzyme in diverse mungbean genotypes. There was a wide variation in PHS tolerance and FSG among 163 genotypes examined and 14 genotypes were found to be tolerant (<20%) to PHS. Seed germination in a pod, a measure used to evaluate PHS, varied from 7.14% in germplasm accession Chamu 4 to 82.52% in cultivated variety IPM 2–3. There was a marked increase in α-amylase activity in genotypes showing high FSG and PHS, especially at 48 and 72 h after germination as compared with PHS tolerant genotypes. Therefore, α-amylase can be used as an effective biochemical marker to evaluate a large number of mungbean genotypes for FSD and PHS. Also, the variation in seed germinability as found in this study could be further used for mungbean improvement programme.

scholarly journals The Use of 2,3,5-Triphenyl-Tetrazoliumchloride as a Measure of Seed Germinability

1947 ◽  
Vol 22 (2) ◽  
pp. 149-159 ◽  
Author(s):  
R. H. Porter ◽  
Mary Durrell ◽  
H. J. Romm
Keyword(s):  
Seed Germinability
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