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Grafted Plants (grafted + plant)
Selected AbstractsScreening for resistance to Didymella bryoniae in rootstocks of melonEPPO BULLETIN, Issue 2 2000P. Trionfetti Nisini Glasshouse evaluations of rootstocks of melon for resistance to Didymella bryoniae were conducted on different cucurbits previously selected as resistant or partially resistant to race 1,2 of Fusarium oxysporum f. sp. melonis. Cucumis anguria, C. ficifolius, C. figarei, C. metuliferus, C. zeyheri and Benincasa hispida showed a very high degree of resistance to D. bryoniae both on leaves and stems. Among the commercial rootstocks, Cucurbita hybrids ELSI, ES 99-13, RS 841, displayed a similar level of resistance. Stem inoculation of three cucurbit species grafted with susceptible melon cv. Proteo determined the occurrence of limited symptoms, but the lesions remained confined in the rootstock not affecting the grafted plant. Cultivation of susceptible melon cultivars grafted on resistant rootstocks may represent an efficient method for controlling Didymella crown rot and Fusarium wilt. [source] Fruit quality of mini-watermelon as affected by grafting and irrigation regimesJOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Issue 6 2008Simona Proietti Abstract BACKGROUND: The Mediterranean region suffers water deficit that affects fruit yield and quality. Grafting improves crop tolerance to disease and drought, but the taste and quality of fruit may be negatively affected. The aim of the present work was to determine the quality parameters of mini-watermelon, ungrafted or grafted onto a squash hybrid rootstock, and grown under different irrigation regimes: 1.0, 0.75, and 0.5 of evapotranspiration (ET) rates. RESULTS: The interaction between grafting and irrigation rate was not significant for the variables tested. The highest fruit yields were recorded at 1.0 ET and at 0.75 ET with respect to 0.5 ET, and they were obtained in grafted plants. Fruit quality was slightly affected by drought, with an increase in K, Mg and spermine concentrations, especially with 0.5 ET. Nitrate concentration in the watermelon pulp was very low (average 10 mg kg,1 fresh weight). Fruit quality parameters were similar in grafted and ungrafted plants, whereas the titratable acidity (TA), juice electrical conductivity, TSS/TA ratio, K and Mg concentrations were improved in the grafted one. Lycopene, dehydroascorbate (DAscA) and total vitamin C contents for grafted plants were higher by 40.5%, 13% and 7.3%, respectively, than those from ungrafted plants. Spermidine and putrescine concentrations were reduced by grafting (by 24% and 59%, respectively). CONCLUSION: Grafting of mini-watermelon under irrigation deficit did not modify crop response to water availability, but increased productivity and induced small positive changes in plant quality and nutritional value. Copyright © 2008 Society of Chemical Industry [source] Does engineering abscisic acid biosynthesis in Nicotiana plumbaginifolia modify stomatal response to drought?PLANT CELL & ENVIRONMENT, Issue 5 2001C. Borel ABSTRACT The consequences of manipulating abscisic acid (ABA) biosynthesis rates on stomatal response to drought were analysed in wild-type, a full-deficient mutant and four under-producing transgenic lines of N. plumbaginifolia. The roles of ABA, xylem sap pH and leaf water potential were investigated under four experimental conditions: feeding detached leaves with varying ABA concentration; injecting exogenous ABA into well-watered plants; and withholding irrigation on pot-grown plants, either intact or grafted onto tobacco. Changes in ABA synthesis abilities among lines did not affect stomatal sensitivity to ABA concentration in the leaf xylem sap ([ABA]xyl), as evidenced with exogenous ABA supplies and natural increases of [ABA]xyl in grafted plants subjected to drought. The ABA-deficient mutant, which is uncultivable under normal evaporative demand, was grafted onto tobacco stock and then presented the same stomatal response to [ABA]xyl as wild-type and other lines. This reinforces the dominant role of ABA in controlling stomatal response to drought in N. plumbaginifolia whereas roles of leaf water potential and xylem sap pH were excluded under all studied conditions. However, when plants were submitted to soil drying onto their own roots, stomatal response to [ABA]xyl slightly differed among lines. It is suggested, consistently with all the results, that an additional root signal of soil drying modulates stomatal response to [ABA]xyl. [source] Performance of Galia-type melons grafted on to Cucurbita rootstock in Monosporascus cannonballus -infested and non-infested soilsANNALS OF APPLIED BIOLOGY, Issue 3 2005R COHEN Summary Galia-type melons grafted on to the Cucurbita rootstock,TZ 148'and non-grafted controls were evaluated for vegetative development under greenhouse conditions. In general, the development of grafted and non-grafted plants was similar within a cultivar. The horticultural and pathological performances of the Galia-type melons ,Carrera', ,NUN-5554', ,6003' and ,Arava' were evaluated in experiments conducted in non-infested and Monosporascus-infested soils. In non-infested soil, grafted and non-grafted ,Carrera', ,NUN-5554' and ,Arava' had the same yields. The yield of grafted ,6003' was significantly higher than that of its non-grafted control. Responses of grafted and non-grafted Galia-type melons to Monosporascus cannonballus were evaluated and compared in the spring and autumn growing seasons. Significant differences in disease incidence were found among cultivars, between grafted and non-grafted plants, and between growing seasons. Disease reduction and the beneficial effect of grafting on yield were more pronounced in the spring. The results indicate that Galia-type melons can be grafted successfully, but the cultivation of the grafted plants should be adapted to each growing area and season. [source] | ||||||||||