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Shabtay A Eitam H Tadmor Y Orlov A Meir A Weinberg P Weinberg ZG Chen Y Brosh A Izhaki I Kerem Z 《Journal of agricultural and food chemistry》2008,56(21):10063-10070
Pomegranate peel is a nutritive-rich byproduct whose amounts are extensively growing due to the exponential increase in the production of pomegranate juice and "ready to eat" arils. Pomegranate peel is a rich source for antioxidants and thus may serve in the prevention of cattle diseases and in the improvement of beef products, making it an attractive component in beef cattle diets. The present study aims to evaluate the effect of commonly used storage practices on the nutritive and antioxidative properties of pomegranate peel. In general, storage conditions preserved most antioxidant capacity. Ensiling ambivalently affected the nutritive values of the peel and promoted increased levels of antioxidative components. In addition to polyphenols, nonphenolic components, such as alpha- and gamma-tocopherols, contributed to the total antioxidative capacity, and several minerals found in the peel added to its nutritional value. Dietary supplementation with fresh peels promoted significant increases in feed intake and alpha-tocopherol concentration in the plasma, with positive tendency toward increased weight gain of bull calves. All in all, the nutritive value and the antioxidant capacity of pomegranate peel turn it into a favorable health-promoting constituent of feedlot beef cattle diet. 相似文献
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Yigalelad Y. Ben-Yephet Michal Reuven L Mor Shulamit Manulis C. Shoham G. Forer M. J. Berlinger Lea Bar Nir D. Wool S. Cohen D. Veierov N. Aharonson Annie Fenigstein A. R. Horowitz N. C. Toscano D. Gerung Pnina Rapid D. Gerling Shalom W. Applebaum M. Klein B. Raccah R. G. Kenneth 《Phytoparasitica》1989,17(3):223-236
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Wilson M Moshitzky P Laor E Ghanim M Horowitz AR Morin S 《Pest management science》2007,63(8):761-768
Pyriproxyfen, a juvenile hormone (JH) mimic, is a biorational insecticide that disrupts insect development. It is one of the principal insecticides being used to control Bemisia tabaci (Gennadius) on cotton, and has many environmentally positive attributes that make it compatible with integrated pest management (IPM) programs. In Israel, a high level of resistance to pyriproxyfen has been observed in several isolated regions. Here, tests were conducted to establish whether temporal refuges from exposure to pyriproxyfen could be useful for restoring the effectiveness of the compound. Resistance was found to decrease by a factor of 8 when exposure to pyriproxyfen was ceased for 13 generations. Reversal of resistance was accompanied with increased biotic fitness of the revertant colony. By incorporating experimental estimates of nymph survival, sex ratio, fecundity, egg hatching rate and developmental time, the seasonal cost per generation for resistant insects was estimated to be 25%. A genetic simulation model, optimized by empirical data from bioassays, predicted fitness cost per generation of 19% for resistant homozygous (RR) females and hemizygous (R) males, and produced rates of reversal similar to the experimental results. The model also predicted that, even after 5 years ( approximately 55 generations) without pyriproxyfen treatments, the frequency of the resistance allele (R) will still remain high (0.02). It is therefore concluded, on the basis of experimental and modeling results, that the effectiveness of temporal refuges for reversing development of resistance to pyriproxyfen in B. tabaci may be limited. 相似文献
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植物生态适应性在植物水生诱导上的运用 总被引：6，自引：0，他引：6
本文通过论述植物普遍存在的生态适应性,环境变化对适应性形成及进化上的影响,以及植物生态适应性形成过程中胁迫环境的重要性,分析了植物水生诱导过程中相关的生理生化生态的变化规律,提出了利用人工环境模拟技术来促进植物通气组织形成的技术路线,形成了一套完整可操作的植物水生诱变操作流程,并展现了植物水生诱变技术在生产生活生态上的广阔前景与市场空间。 相似文献
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ABSTRACT A leaf rust attacking Aegilops speltoides in its natural habitat is reported for the first time. It was found in two locations in northern and central Israel. The two collections from A. speltoides resemble wheat leaf rust, Puccinia triticina, in most spore dimensions, in the morphology of the substomatal vesicle of the urediniospore, and in DNA content in pycniospore nuclei. Similarly to P. triticina isolates from wheat, isolates taken from A. speltoides are compatible with Thalictrum speciosissimum as an aecial host and they are crossed easily with wheat leaf rust isolates. However, isolates from A. speltoides differ from wheat leaf rust in their telial host range. They are avirulent to cultivated wheat cultivars, but attack hundreds of A. speltoides accessions that were immune to wheat leaf rust. This distinct host preference justifies delineation of the newly found leaf rust as a forma specialis (f. sp. speltoides) within P. triticina. 相似文献
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欧洲大樱桃的组织培养与快速繁殖 总被引：1，自引：0，他引：1
以欧洲大樱桃幼嫩茎段为外植体材料,研究了不同浓度6-BA和IAA外源激素配比组合和不同培养温度对樱桃茎段离体培养的影响,结果表明:在附加6-BA 1.5 mg/LI、AA 0.3 mg/L的MS培养基上茎段外植体生长健壮,芽分化数和诱导率较高,为茎段初代培养的最适培养基。温度对茎段组织培养再生不定芽也有一定的影响。在培养温度为先15℃、后25℃的条件下,茎段外植体芽分化数为7.4个,芽诱导率为99%。这表明经低温15℃条件下处理的外植体比其他温度条件更能诱导芽分化。 相似文献
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