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《International Journal of Fruit Science》2013,13(1):87-96
ABSTRACT The effects of salt (NaCl) applications of various concentrations (0, 500, 1000 and 2000 mg/L) for 6 months on ‘Camarosa’ and ‘Chandler’ strawberry varieties grown in perlite and perlite:zeolite (1:1) media were investigated. In order to determine the salt resistance of varieties, the tolerance index (T.I.) and tolerance ratio (T.R.) were calculated on the basis of total chlorophyll content, and leaf and root dry weight. Also, the ability of keep in balance for potassium:sodium (K:Na) ratio in the aerial part and roots of plants were considered. It was determined that the highest T.I. and T.R. values calculated on the basis of leaf and root dry weight in cv. Camarosa in both media. Concerning the evaluations calculated on the basis of total chlorophyll, the results indicated that ‘Chandler’ is more resistant in perlite medium, ‘Camarosa’ is more resistant in perlite:zeolite (1:1) medium. K:Na ratio decreased with increasing salinity in both varieties. However, it was determined that K:Na ratio is higher in cv. Chandler, i.e., 0.83 than in cv. Camarosa (0.61). As a conclusion, it was determined that ‘Camarosa’ was more resistant to salt than ‘Chandler’. In addition, regarding the salt resistant performance of plants, perlite:zeolite (1:1) medium had more effective results than perlite. 相似文献
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‘大白’秋海棠是由大围山秋海棠和大王秋海棠的白花类型‘白王’秋海棠杂交F1 选育而成,根茎类、无地上茎, 叶大型, 全缘, 常被浅白色或紫红色斑, 花多、鲜红色。‘健绿’秋海棠由厚叶秋海棠和掌叶秋海棠杂交F1 选育而成, 常绿草本, 直立茎粗壮, 长势旺盛, 抗白粉病, 叶大型、绿色、浅裂, 花红色艳丽, 宜室内栽培观赏。‘美女’秋海棠为掌叶秋海棠和愉悦秋海棠的杂交F1 白斑叶个体, 根茎类,直立茎较细, 叶中型、浅裂、被白色斑点, 较抗白粉病。‘中大’秋海棠为中华秋海棠和大王秋海棠杂交F1 培育而成, 根茎类、具直立茎, 叶中型、表面具心形白带斑。 相似文献
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SUMMARYThe growth and photosynthesis of Oncidium ‘Goldiana’, a popular tropical orchid for cut flower production, were studied. Four main developmental stages were identified: bud stage, plantlet stage, unsheathing stage and pseudobulb stage. Pseudobulb formation occurred during the unsheathing stage which was closely followed by the formation of an inflorescence. The pseudobulb is of the heteroblastic type (arising from a single node) and lacks stomata. It is a G, shade plant based on chlorophyll a/b ratio, C02 compensation point, post-illumination C02 outburst and light response curves. The formation of new sinks such as inflorescence and axillary bud have a significant effect on the rate of photosynthesis of certain leaves. The photosynthetic rates of leaves L2 and L3 increased during the development of the axillary bud and inflorescence respectively. Pseudobulbs have high water content and contain chlorophyll but show no sign of gas exchange in light and dark. However, fixation of C02 is possible in light with partial removal of the underlying cuticle. 相似文献
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K. M. Jones B. Graham Sally A. Bound M. J. Oakford 《The Journal of Horticultural Science and Biotechnology》2013,88(1):139-147
Trials in southern Tasmania examined the thinning effects of ethephon on ‘Gala’ and ‘Jonagold’ apples. Untreated controls were compared with ethephon thinning sprays applied at full bloom at 50,100,200,400,800 and 1 600 mg I“1 to both cultivars. Thinning of both cultivars was related to the concentration of the spray and in most cases logistic models were fitted. Thinning effectiveness was largely reflected in increased fruit weight and size. The ‘Gala’ fruit was still not large enough for Australian markets. Ethephon at 200 mg I“1 effectively thinned ‘Jonagold’ and produced the required increases in fruit size and weight. ‘Jonagold’ was overthinned by the high concentrations of ethephon, but this was not reflected in increased fruit weight and size. Ethephon also reduced vegetative growth at the higher concentrations which was considered an advantage. More work is required to establish specific recommendations for either cultivar. 相似文献
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‘昆明鸟’秋海棠系由大王秋海棠和掌叶秋海棠杂交F1选育而成,常有多节短茎,叶浅型、被浅白斑,直立性较强,抗倒伏,抗白粉病,具较高的观赏价值。‘康儿’秋海棠由大王秋海棠和长翅秋海棠杂交F1选育而成,常用1-3节花茎,叶大型、浅裂,长势旺盛,抗白粉病极强,适宜栽培观赏。‘白雪’秋海棠为野外发现的自然杂交新品种,通过研究证实其为变色秋海棠和掌叶秋海棠的杂交F1代个体,为根茎类秋海棠,无地上茎或地上茎不明显,叶片中型、被毛、浅裂且密被白色斑点,十分美丽,对白粉病有较强的抗性。 相似文献
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‘白玉’秋海棠由大王秋海棠的白花类型选育而成,叶片浅绿色、被白斑,花白色、较大、果实绿色,‘银珠’秋海棠为掌叶秋海棠的变异类型,与原种的主要区别在于其叶片被有稳定的银白色串珠状斑点,花较小,色略浅,‘热带女’秋海棠由野生斜开秋海棠中发现的少数变异类型选育而成,叶片绿色、被白斑,花粉红色或白色,重在观叶。 相似文献
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‘昆明鸟’秋海棠系由大王秋海棠和掌叶秋海棠杂交F1 选育而成, 常有多节短茎, 叶浅裂、被浅白斑, 直立性较强, 抗倒伏, 抗白粉病, 具较高的观赏价值。‘康儿’秋海棠由大王秋海棠和长翅秋海棠杂交F1 选育而成, 常有1~3 节花茎, 叶大型、浅裂, 长势旺盛, 抗白粉病极强, 适宜栽培观赏。‘白雪’秋海棠为野外发现的自然杂交新品种, 通过研究证实其为变色秋海棠和掌叶秋海棠的杂交F1 代个体, 为根茎类秋海棠, 无地上茎或地上茎不明显, 叶片中型、被毛、浅裂且密被白色斑点, 十分美丽, 对白粉病有较强的抗性。 相似文献