Lupin prospects improve with pinpointed disease causation

Nov 22, 2013 by Joshua Rampling
Lupin prospects improve with pinpointed disease causation
Lupin grown by Australian farmers accounts for 85 per cent of the yearly global crop, while WA grows 80 per cent of the national crop.Image: Narrow-leafed lupin (Lupinus angustifolius). Credit: Kevin Thiele

The cause of a disease affecting the local lupin industry has been discovered in PhD research at UWA's Institute of Agriculture.

Black Pod Syndrome (BPS) is a severe necrotic disease of lupin pods which causes large crop losses and prevents many WA farmers from growing lupin, especially in the south-west coastal area of the state.

BPS causes the pods on lupin plants to turn dark brown or black and halts or reduces seed production.

UWA PhD researcher Monica Kehoe says the study has been able to cement suspicions that researchers have had on the cause of BPS.

"The most important result of the research is the confirmation that late infection with Bean yellow mosaic virus [BYMV] is the cause of BPS in narrow-leafed lupins," Ms Kehoe says.

BYMV is mostly found in high rainfall wheatbelt zones and is endemic in south-western Australia.

The virus can infect clover plants next to pastures of lupin and is spread by aphids. It is especially difficult to control as it can survive from one growing season to the next in the infected clover.

Ms Kehoe says her research – which involved PCR and ELISA testing of lupin in five locations, and greenhouse cultivar studies – shows the timing of infection of the virus plays a large part in causing BPS.

"If the BYMV infection occurs before the primary pods are forming, the plant will turn fully necrotic and die as we would expect with a typical early BYMV infection," she says.

"Infection after the primary pods have developed leads to symptoms of BPS ... and yields are greatly reduced."

Now that the cause has been found Ms Kehoe says farmers can more confidently plan prevention strategies to stop BPS from causing major losses.

"Ultimately a variety of narrow-leafed lupin with resistance to BPS is the goal," Ms Kehoe says.

"The lupin breeding team at DAFWA [Department of Agriculture and Food] screens huge numbers of accessions each year for a number of molecular markers that have already been located for various other traits including disease resistances.

"So finding a molecular marker for BPS that can be incorporated into that process is the next logical step."

There is currently one variety of lupin that exhibits partial resistance to BPS and Ms Kehoe says resistance is something that DAFWA researchers are looking at.

Explore further: Untangling DNA with a droplet of water, a pipet and a polymer

add to favorites email to friend print save as pdf

Related Stories

Getting to the root of better crops

May 16, 2013

(Phys.org) —The more crop scientists know about how plant roots take up water and nutrients, the better able they will be to develop crop plants with roots that can cope with challenging soil and environmental ...

A little lupin improves the bread of life

Jun 13, 2011

You can lower your risk of heart disease significantly, just by using flour containing 40 per cent lupin beans in the place of conventional wholemeal flour, according to research by Victoria University dietitian ...

Crop root study to boost Australian grain production

May 09, 2012

Researchers at The University of Western Australia say that "next frontier" of agricultural science is understanding the root system and function of crop plants to significantly increase Australian grain production, ...

Recommended for you

Cultivation of microalgae via an innovative technology

Feb 27, 2015

Preliminary laboratory scale studies have shown consistent biomass production and weekly a thick microalgal biofilm could be harvested. A new and innovative harvesting device has been developed for ALGADISK able to directly ...

Refined method to convert lignin to nylon precursor

Feb 27, 2015

A new study from the Energy Department's National Renewable Energy Laboratory (NREL) demonstrates the conversion of lignin-derived compounds to adipic acid, an important industrial dicarboxylic acid produced for its use as ...

Living in the genetic comfort zone

Feb 26, 2015

The information encoded in the DNA of an organism is not sufficient to determine the expression pattern of genes. This fact has been known even before the discovery of epigenetics, which refers to external ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.