Heping Han
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View article: What Is New for the Mechanisms of Plant Resistance to Paraquat After Decades of Research?
What Is New for the Mechanisms of Plant Resistance to Paraquat After Decades of Research? Open
Paraquat is one of the most widely used nonselective herbicides globally. Although the emergence of weed resistance to paraquat has progressed relatively slowly since the first reported case in Japan in 1980, it has been steadily increasin…
View article: Cytochrome CYP72A15 may play a role in metabolic resistance to mesotrione in wild radish
Cytochrome CYP72A15 may play a role in metabolic resistance to mesotrione in wild radish Open
In our previous study with a wild radish (Raphanus raphanistrum) population resistant to HPPD-inhibiting herbicides we indicated that two additional candidate P450 genes, CYP71A28 and CYP72A13-like, may also contribute to the resistance. T…
View article: <scp>EPSPS</scp> target site mechanisms confer glyphosate resistance in <scp><i>Arctotheca calendula</i></scp>
<span>EPSPS</span> target site mechanisms confer glyphosate resistance in <span><i>Arctotheca calendula</i></span> Open
BACKGROUND The first case of glyphosate resistance was reported in a capeweed population from Western Australia in our previous study. This current study investigates the resistance mechanisms in the population. RESULTS Target‐site EPSPS g…
View article: Allelic interactions defining <i>Raphanus raphanistrum</i><scp><i>AHAS</i></scp> resistance level: strong <i>vs</i> weak target‐site <scp>AHAS</scp> resistance alleles
Allelic interactions defining <i>Raphanus raphanistrum</i><span><i>AHAS</i></span> resistance level: strong <i>vs</i> weak target‐site <span>AHAS</span> resistance alleles Open
BACKGROUND Chlorsulfuron resistance and genetic dominance was evaluated in Raphanus raphanistrum genotypes homozygous (122‐RR, 376‐RR), heterozygous (122‐RS, 376‐RS) and compound heterozygous (122‐R/376‐R) for the target‐site resistance mu…
View article: A naturally evolved mutation (Ser-59-Gly) in glutamine synthetase confers glufosinate resistance in plants
A naturally evolved mutation (Ser-59-Gly) in glutamine synthetase confers glufosinate resistance in plants Open
Glufosinate is an important and widely used non-selective herbicide active on a wide range of plant species. Resistance evolution to glufosinate in weedy plant species (including the global weed Eleusine indica) is underway. Here, we uncov…
View article: Aldo‐keto reductase may contribute to glyphosate resistance in <i>Lolium rigidum</i>
Aldo‐keto reductase may contribute to glyphosate resistance in <i>Lolium rigidum</i> Open
Background We have previously demonstrated that an aldo‐keto reductase (AKR) from Echinochloa colona (EcAKR4‐1) can metabolize glyphosate and confers glyphosate resistance. This study aims to investigate if the EcAKR4‐1 orthologs from Loli…
View article: A naturally evolved mutation (Ser59Gly) in glutamine synthetase confers glufosinate resistance in plants
A naturally evolved mutation (Ser59Gly) in glutamine synthetase confers glufosinate resistance in plants Open
Glufosinate is an important and widely used non-selective herbicide active on a wide range of plant species. Evolution of resistance to glufosinate in weedy plant species (including the global weed Eleusine indica) is underway. Here, we es…
View article: An ABCC-type transporter endowing glyphosate resistance in plants
An ABCC-type transporter endowing glyphosate resistance in plants Open
Significance Glyphosate is the world’s dominantly used herbicide to control weedy plant species in a wide range of situations, especially in global field crops of soybean, maize, canola, and cotton with genetically engineered glyphosate re…
View article: Contrasting plant ecological benefits endowed by naturally occurring <i>EPSPS</i> resistance mutations under glyphosate selection
Contrasting plant ecological benefits endowed by naturally occurring <i>EPSPS</i> resistance mutations under glyphosate selection Open
Concurrent natural evolution of glyphosate resistance single‐ and double‐point EPSPS mutations in weed species provides an opportunity for the estimation of resistance fitness benefits and prediction of equilibrium resistance frequencies i…
View article: Cytochrome P450 CYP81A10v7 in <i>Lolium rigidum</i> confers metabolic resistance to herbicides across at least five modes of action
Cytochrome P450 CYP81A10v7 in <i>Lolium rigidum</i> confers metabolic resistance to herbicides across at least five modes of action Open
SUMMARY Rapid and widespread evolution of multiple herbicide resistance in global weed species endowed by increased capacity to metabolize (degrade) herbicides (metabolic resistance) is a great threat to herbicide sustainability and global…
View article: Mechanistic basis for synergism of 2,4-D amine and metribuzin in <i>Avena sterilis</i>
Mechanistic basis for synergism of 2,4-D amine and metribuzin in <i>Avena sterilis</i> Open
The combination of herbicides with different modes of action has been adopted not only to improve weed control but also to increase the environmental sustainability of plant-protection products. In this study, we showed a synergistic effec…
View article: Diversity of α‐tubulin transcripts in <i>Lolium rigidum</i>
Diversity of α‐tubulin transcripts in <i>Lolium rigidum</i> Open
BACKGROUND Tubulin, the target site of dinitroaniline herbicides, is encoded by small gene families in plants. To better characterize the mechanisms of target‐site resistance to dinitroaniline herbicides in the globally important weedy spe…
View article: Metribuzin resistance via enhanced metabolism in a multiple herbicide resistant <scp> <i>Lolium rigidum</i> </scp> population
Metribuzin resistance via enhanced metabolism in a multiple herbicide resistant <span> <i>Lolium rigidum</i> </span> population Open
BACKGROUND The photosystem II (PSII)‐inhibiting herbicides are important for Australian farmers to control Lolium rigidum Gaud. and other weed species in trazine tolerant (TT)‐canola fields. A L. rigidum population (R) collected from a TT‐…
View article: 2,4-D antagonizes glyphosate in glyphosate-resistant barnyard grass <i>Echinochloa colona</i>
2,4-D antagonizes glyphosate in glyphosate-resistant barnyard grass <i>Echinochloa colona</i> Open
Glyphosate is often tank-mixed with auxinic herbicide 2,4-D for grass and broadleaf weed control. Here we examined the possible interaction of 2,4-D and glyphosate in barnyard grass, Echinochloa colona (L.) Link. The results showed that 2,…
View article: Evolution of resistance to HPPD‐inhibiting herbicides in a wild radish population via enhanced herbicide metabolism
Evolution of resistance to HPPD‐inhibiting herbicides in a wild radish population via enhanced herbicide metabolism Open
BACKGROUND Relatively new herbicides that target 4‐hydroxyphenylpyruvate dioxygenase (HPPD) are now available for use on the world's great grain crops (rice, wheat, corn and soybean) and for other uses. With widespread and persistent use o…
View article: Aldo-keto Reductase Metabolizes Glyphosate and Confers Glyphosate Resistance in <i>Echinochloa colona</i>
Aldo-keto Reductase Metabolizes Glyphosate and Confers Glyphosate Resistance in <i>Echinochloa colona</i> Open
Glyphosate, the most commonly used herbicide in the world, controls a wide range of plant species, mainly because plants have little capacity to metabolize (detoxify) glyphosate. Massive glyphosate use has led to world-wide evolution of gl…
View article: Quinclorac Resistance in Echinochloa crus-galli from China
Quinclorac Resistance in Echinochloa crus-galli from China Open
Echinochloa crus-galli is a major weed in rice fields in China, and quinclorac has been long used for its control. Over-reliance of quinclorac has resulted in quinclorac resistance in E. crus-galli. Two resistant (R) E. crus-galli populati…
View article: A Val‐202‐Phe α‐tubulin mutation and enhanced metabolism confer dinitroaniline resistance in a single <i>Lolium rigidum</i> population
A Val‐202‐Phe α‐tubulin mutation and enhanced metabolism confer dinitroaniline resistance in a single <i>Lolium rigidum</i> population Open
BACKGROUND A Lolium rigidum population collected from Western Australia was previously reported as highly resistant to dinitroaniline herbicides mainly due to a Val‐202‐Phe substitution in the target site α‐tubulin protein. To further dete…
View article: Enhanced Trifluralin Metabolism Can Confer Resistance in <i>Lolium rigidum</i>
Enhanced Trifluralin Metabolism Can Confer Resistance in <i>Lolium rigidum</i> Open
Resistance to the pre-emergence herbicide trifluralin is increasing in Australian annual ryegrass ( Lolium rigidum) populations. Three L. rigidum populations (R1, R2, and R3) collected from Australian grain fields were identified with trif…
View article: Novel α-Tubulin Mutations Conferring Resistance to Dinitroaniline Herbicides in Lolium rigidum
Novel α-Tubulin Mutations Conferring Resistance to Dinitroaniline Herbicides in Lolium rigidum Open
The dinitroaniline herbicides (particularly trifluralin) have been globally used in many crops for selective grass weed control. Consequently, trifluralin resistance has been documented in several important crop weed species and has recent…
View article: 24 Resolution of Discrepant Results in Serum Protein Electrophoresis and Immunofixation Electrophoresis
24 Resolution of Discrepant Results in Serum Protein Electrophoresis and Immunofixation Electrophoresis Open
Serum protein electrophoresis (SPEP) from a 77-year-old male patient and a 33-year-old female patient showed an abnormal SPEP pattern with a M-spike in the beta region. The 77-year-old male patient had a 1 g/dL (17.6%) densitometer result …
View article: Dinitroaniline herbicide resistance in a multiple‐resistant <scp><i>Lolium rigidum</i></scp> population
Dinitroaniline herbicide resistance in a multiple‐resistant <span><i>Lolium rigidum</i></span> population Open
BACKGROUND The pre‐emergence dinitroaniline herbicides (such as trifluralin and pendimethalin) are vital to Australian no‐till farming systems. A Lolium rigidum population collected from the Western Australian grain belt with a 12‐year tri…
View article: A double EPSPS gene mutation endowing glyphosate resistance shows a remarkably high resistance cost
A double EPSPS gene mutation endowing glyphosate resistance shows a remarkably high resistance cost Open
A novel glyphosate resistance double point mutation (T102I/P106S, TIPS) in the 5‐enolpyruvylshikimate‐3‐phosphate synthase (EPSPS) gene has been recently identified for the first time only in the weed species Eleusine indica . Quantificati…