3 research outputs found
Graft incompatibility in Prunus
A incompatibilidade de enxertia Ă© um problema
que, alĂ©m de prejuĂzo econĂŽmico aos produtores, causa atraso
no lançamento de novas cultivares-copa e portaenxertos,
devido ao longo perĂodo de tempo necessĂĄrio para os testes de
compatibilidade. O objetivo desta revisĂŁo Ă© fazer um apanhado
das principais e mais relevantes pesquisas realizadas envolvendo
o tema incompatibilidade de enxertia em espĂ©cies frutĂferas,
especialmente as do gĂȘnero Prunus. Incompatibilidade Ă© um
fenÎmeno extremamente complexo, que envolve interaçÔes
anatĂŽmicas, fi siolĂłgicas, bioquĂmicas e moleculares entre a
cultivar-copa e o portaenxerto. Sendo, por essa razĂŁo, um problema
de difĂcil estudo. PorĂ©m, acredita-se que atravĂ©s de uma anĂĄlise
conjunta dos diversos mecanismos de incompatibilidade, se pode
avançar mais rapidamente no entendimento deste fenÎmeno.The graft incompatibility is a problem that causes
economic loss to producers and delay in the launch of new cultivars
and rootstock because of the long time required for compatibility
testing. The aim of this review is to show of the most important
and relevant research conducted over the years involving the graft
incompatibility in fruit species, specially the genus Prunus. The
graft incompatibility is an extremely complex phenomenon that
involves anatomical, physiological, biochemical and molecular
interactions between scion and rootstock. Being for this reason a
diffi cult problem to analyze. However, it is believed that through
a joint analysis of graft incompatibility the understanding of the
mechanisms may advance more quickly and so allow the solution
for the phenomenon.Publishe
Genotypic differences in cyanogenic glycosides levels of compatible Prunus persica P. persica and incompatible P. persica P. mume combinations
Graft incompatibility is a phenomenon associated
with complex physiological, biochemical, and genetic interactions
between scion and rootstock. The main objective of this work was
to assess the role of cyanogenic glycosides (CGs), amygdalin
and prunasin, in the graft incompatibility of Prunus and possible
biochemical effects in compounds of the phenylpropanoid pathway.
Graft compatibility, amygdalin and prunasin content, phenylalanine
ammonia-lyase activity, total phenolic compounds content and
antioxidant activity, were studied in different graft combinations
(Chimarrita/Capdeboscq; Chimarrita/Tsukuba 1; Chimarrita/Umezeiro;
Maciel/Capdeboscq; Maciel/âTsukuba 1; Maciel/Umezeiro) and
ungrafted genotypes. The results indicate that there was graft incompatibility of Chimarrita and Maciel cultivars grafted into
Umezeiro rootstock. Combinations identified as incompatible
showed higher prunasin concentration and phenylalanine ammonialyase
(PAL) activity in rootstock and greater concentration of total
phenolics compounds and antioxidant activity in scion and rootstock.
The results indicate that large differences in CGs concentration,
especially prunasin, can be the graft incompatibility cause between
Prunus persica and P. mume. The prunasin concentration may be
considered a promising marker to predict graft compatibility between
P. persica and P. mume.We acknowledge the Coordination for the Improvement
of Higher Education Personnel (CAPES) for their financial
support.graft incompatibilityamygdalinprunasinphenylalanine ammonia-lyaseoxidative stressPublishe