In horticulture,grafting is a popular technique used to combine positive traits from two different plants.This is achieved by joining the plant top part(scion)onto a rootstock which contains the stem and roots.Rootsto...In horticulture,grafting is a popular technique used to combine positive traits from two different plants.This is achieved by joining the plant top part(scion)onto a rootstock which contains the stem and roots.Rootstocks can provide resistance to stress and increase plant production,but despite their wide use,the biological mechanisms driving rootstock-induced alterations of the scion phenotype remain largely unknown.Given that epigenetics plays a relevant role during distance signalling in plants,we studied the genome-wide DNA methylation changes induced in eggplant(Solanum melongena)scion using two interspecific rootstocks to increase vigour.We found that vigour was associated with a change in scion gene expression and a genome-wide hypomethylation in the CHH context.Interestingly,this hypomethylation correlated with the downregulation of younger and potentially more active long terminal repeat retrotransposable elements(LTR-TEs),suggesting that graft-induced epigenetic modifications are associated with both physiological and molecular phenotypes in grafted plants.Our results indicate that the enhanced vigour induced by heterografting in eggplant is associated with epigenetic modifications,as also observed in some heterotic hybrids.展开更多
Given the attention drawn since several decades by arbuscular mycorrhizal fungi (AMF) as potential biological alternatives to chemicals in a low-input agriculture, much effort has been spent in the investigation of me...Given the attention drawn since several decades by arbuscular mycorrhizal fungi (AMF) as potential biological alternatives to chemicals in a low-input agriculture, much effort has been spent in the investigation of mechanisms influencing the dynamics inside AMF communities. In the present study we evaluated the influence of different crop rotations on the AMF soil community, after a 50 y long-term field experiment established at Martonvásár, Hungary. Four types of crop rotation were chosen for sampling: corn monocropping, corn-alfalfa, corn-wheat, and corn-spring barley-peas-wheat. Community composition of AMF in soil was analyzed with a molecular approach amplifying a portion of 28S rDNA. The crop rotation practice didn’t show an influence on identity of the species composing AMF assemblages, but on the other hand seemed to affect positively the true diversity, defined as number of MOTUs present in the communities.展开更多
文摘In horticulture,grafting is a popular technique used to combine positive traits from two different plants.This is achieved by joining the plant top part(scion)onto a rootstock which contains the stem and roots.Rootstocks can provide resistance to stress and increase plant production,but despite their wide use,the biological mechanisms driving rootstock-induced alterations of the scion phenotype remain largely unknown.Given that epigenetics plays a relevant role during distance signalling in plants,we studied the genome-wide DNA methylation changes induced in eggplant(Solanum melongena)scion using two interspecific rootstocks to increase vigour.We found that vigour was associated with a change in scion gene expression and a genome-wide hypomethylation in the CHH context.Interestingly,this hypomethylation correlated with the downregulation of younger and potentially more active long terminal repeat retrotransposable elements(LTR-TEs),suggesting that graft-induced epigenetic modifications are associated with both physiological and molecular phenotypes in grafted plants.Our results indicate that the enhanced vigour induced by heterografting in eggplant is associated with epigenetic modifications,as also observed in some heterotic hybrids.
文摘Given the attention drawn since several decades by arbuscular mycorrhizal fungi (AMF) as potential biological alternatives to chemicals in a low-input agriculture, much effort has been spent in the investigation of mechanisms influencing the dynamics inside AMF communities. In the present study we evaluated the influence of different crop rotations on the AMF soil community, after a 50 y long-term field experiment established at Martonvásár, Hungary. Four types of crop rotation were chosen for sampling: corn monocropping, corn-alfalfa, corn-wheat, and corn-spring barley-peas-wheat. Community composition of AMF in soil was analyzed with a molecular approach amplifying a portion of 28S rDNA. The crop rotation practice didn’t show an influence on identity of the species composing AMF assemblages, but on the other hand seemed to affect positively the true diversity, defined as number of MOTUs present in the communities.
