Does salt stress increase the ability of the exotic legume Acacia longifolia to compete with native legumes in sand dune ecosystems?

2012 ◽  
Vol 82 ◽  
pp. 74-79 ◽  
Author(s):  
Maria Cristina Morais ◽  
Maria Rosaria Panuccio ◽  
Adele Muscolo ◽  
Helena Freitas
Keyword(s):  
Salt Stress ◽  
Sand Dune ◽  
Stress Increase ◽  
Acacia Longifolia ◽  
Exotic Legume

Polymorphism for Cyanogenesis in Lotus australis Andr. Populations at Greenough Front Flats, Western Australia

1982 ◽  
Vol 30 (2) ◽  
pp. 211 ◽  
Author(s):  
W Foulds
Keyword(s):  
Salt Stress ◽  
Western Australia ◽  
Sand Dune ◽  
Coastal Dunes ◽  
Moisture Stress ◽  
Natural Conditions ◽  
Dune System ◽  
Soil Moisture Stress ◽  
Inland Dunes ◽  
Adult Plants

In populations of Lotus australis growing on a sand dune system south of Geraldton: Western Australia, the seedling stage was polymorphic at the coastal and inland sites, both populations containing about 15% of acyanogenic phenotypes. All but 2% of these acyanogenic seedlings were developmentally flexible and in moist productive conditions eventually metabolized both glucoside and enzyme. This developmental inhibition of glucoside and enzyme may be a response to severe soil moisture stress, salt stress or trampling by sheep. All the adult plants were cyanogenic (under natural conditions) on the coastal dunes but the inland dunes retained a relatively high proportion (12%) of acyanogenic individuals.

scholarly journals Genetic Diversity of Rhizobia Associated with Acacia longifolia in Two Stages of Invasion of Coastal Sand Dunes

2007 ◽  
Vol 73 (15) ◽  
pp. 5066-5070 ◽  
Author(s):  
Susana Rodríguez-Echeverría ◽  
João A. Crisóstomo ◽  
Helena Freitas
Keyword(s):  
Genetic Diversity ◽  
Sand Dune ◽  
Root Nodule ◽  
Sand Dunes ◽  
Nodule Bacteria ◽  
Coastal Sand Dunes ◽  
Dune System ◽  
Coastal Sand ◽  
Acacia Longifolia ◽  
Two Stages

ABSTRACT We examined the genetic diversity of root nodule bacteria associated with the Australian legume Acacia longifolia in two stages of invasion of a coastal sand dune system. All isolates belonged to the genus Bradyrhizobium. A higher diversity was found in the long-established trees. The results suggest the introduction of exotic bradyrhizobia with the plant.

The germination success of Acacia longifolia subsp. longifolia (Fabaceae): a comparison between its native and exotic ranges

2019 ◽  
Vol 67 (5) ◽  
pp. 414
Author(s):  
Amali Welgama ◽  
Singarayer Florentine ◽  
Hélia Marchante ◽  
Muhammad Mansoor Javaid ◽  
Christopher Turville
Keyword(s):  
Salt Stress ◽  
Germination Rate ◽  
Key Factors ◽  
Portuguese Population ◽  
Ph Tolerance ◽  
Temperature Regimes ◽  
Eastern Australia ◽  
Wide Range ◽  
Germination Success ◽  
Acacia Longifolia

Acacia longifolia subsp. longifolia is native to South-eastern Australia and has naturalised in many regions across the globe, including in Portugal, Spain, and South Africa invading extensive areas. Prolific seed production and a long-lived seedbank are considered key factors that enhance its invasiveness. Yet, the effects of different factors on germination are still underexplored. Seeds were collected from Portuguese and Australian populations, and germination was evaluated under different temperature regimes, photoperiods, pH levels, salt stress, osmotic potential and burial depths. Findings show both populations share some similar patterns but also reveal important differences related to their germination. Higher temperatures induce increased germination rates while the photoperiod has no effect on germination. Both populations had quicker seed emergence under dark conditions. Seeds from both populations decrease germination rate under increasing salt-stress and show a wide range of pH tolerance, but Australians seeds are more tolerant to increase of both parameters. Seeds from the Portuguese population are bigger and germinated from deeper depths than the Australian. Our results may provide information to improve management of this species seedbank. Germination can prevent by, tillage or other interventions that help to increase burial depths; adding lime (to increase the soil alkalinity) can reduce its germination rate in both geographical ranges.

Nước dưới đất trong cồn cát ven biển phía nam Quảng Bình và định hướng khai thác sử dụng

2018 ◽  
Vol 28 (3) ◽  
pp. 336-345
Author(s):  
Nguyễn Xuân Tặng
Keyword(s):  
Sand Dune ◽  
Coastal Sand Dune ◽  
The South ◽  
Coastal Sand ◽  
Dune Area

Groundwater in coastal sand dune area in the south of Quang Binh province and posibility for exploitation

Salinity Tolerance of Black Gram Cultivars During Germination and Early Seedling Growth

2018 ◽  
Vol 51 (3) ◽  
pp. 51-68 ◽  
Author(s):  
M.K. Hasan ◽  
M.S. Islam ◽  
M.R. Islam ◽  
H.N. Ismaan ◽  
A. El Sabagh
Keyword(s):  
Salt Stress ◽  
Salinity Tolerance ◽  
Seedling Growth ◽  
Negative Impact ◽  
Germination Rate ◽  
Dry Weight ◽  
Germination Percentage ◽  
Shoot Length ◽  
Sand Culture ◽  
Black Gram

Abstract A laboratory experiment regarding germination and seedling growth test was conducted with three black gram genotypes tested under three salinity levels (0, 75 and 150 mM), for 10 days, in sand culture within small plastic pot, to investigate the germination and seedling growth characteristics. Different germination traits of all black gram genotypes, like germination percentage (GP), germination rate (GR), coefficient of velocity of germination (CVG) greatly reduced, as well as mean germination time (MGT) increased with increasing salt stress. At high salt stress, BARI Mash-3 provided the highest GP reduction (28.58%), while the lowest was recorded (15.79% to control) in BARI Mash-1. Salinity have the negative impact on shoot and root lengths, fresh and dry weights. The highest (50.32% to control) and lowest reduction (36.39%) of shoot length were recorded in BARI Mash-2 and BARI Mash-1, respectively, under 150 mM NaCl saline conditions. There were significant reduction of root lengths, root fresh and dry weight, shoot length, shoot fresh and dry weight in all genotypes under saline condition. The genotypes were arranged as BARI Mash-1 > BARI Mash-3 > BARI Mash-2, with respect to salinity tolerance.

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