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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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Plant growth regulators play a vital role in fruit growth and development. However, effects of compounds belonging to the group of brassinosteroids have not been fully investigated in sweet cherries. One relatively new and one commonly applied growth regulator, 22S, 23S-Homobrassinolide and GA3, respectively, were tested on ‘Summit’ and ‘Regina’ sweet cherries to determine the effects on fruit quality and physiological disorders. The substances were applied with a handgun sprayer at full bloom and at the beginning of fruit development (shuck split) for a 2-year period. GA3 was applied at the concentrations of 25, 50, 100 mgL?1 and 22S, 23S-Homobrassinolide at 0.05, 0.1, 0.5 mgL?1. A combined application of 100 mgL?1 GA3 + 0.1 mgL?1 22S, 23S-Homobrassinolide was also applied. Effects of GA3 and 22S, 23S-Homobrassinolide on fruit weight and size were evident for the concentrations applied and between the seasons for both of the cultivars. Combination of the both growth regulators and 100 mgL?1 GA3 alone produced longer fruits compared to the control trees in ‘Regina’. The 22S, 23S-Homobrassinolide applications increased the firmness of the flesh slightly, but not to a great degree, compared to the GA3 applications alone. The brightness of the red color was better with GA3 applications in ‘Summit’ and ‘Regina’. Brassinosteroid caused the fruits to have comparably dull red color. Total soluble solid contents of the cultivars were influenced by the substances and the year of the application. Stem resistance to separation from the fruit was under the influence of both treatments and seasons. In general, 22S, 23S-Homobrassinolide provided better stem resistance than the GA3 applications. There were no effects of the substances on the development of physiological disorders. 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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N. Lucyszyn L. L. F. Ribas M.-R. Sierakowski 《The Journal of Horticultural Science and Biotechnology》2013,88(2):310-314
SummaryThe influence of partial substitution of agar by galactomannans in culture media supplemented with different concentrations of indole-3-butyric acid (IBA) was studied on in vitro rooting of pear (Pyrus communis L.) cultivar ‘Durondeau’ and apple rootstock (Malus prunifolia Borkh.) cultivar ‘Marubakaido’. The galactomannans applied were obtained from Cassia fastuosa (cassia) and Cyamopsis tetragonolobus (guar gum) seeds. The results obtained with mixtures of agar and galactomannan (3 g l–1 each) were compared with those from media solidified with a standard concentration of agar (6 g l–1). The rooting of pear shoots was enhanced significantly in the presence of a mixture of agar plus cassia galactomannan compared to medium solidified with agar only. The modified media promoted a higher number of roots than the control, and increased the percentage of rooted shoots. A maximum of 84.8% rooting was obtained on half-strength MS medium (1?2MS) supplemented with 0.49 µM IBA and solidified with a blend of agar plus cassia galactomannan. For the apple rootstock, only the number of roots per shoot was influenced significantly by the addition of galactomannan to the rooting medium. The highest number of roots per shoot was 16.67 on 1?2MS medium gelled with a mixture of agar plus guar galactomannan supplemented with 4.90 µM IBA. The behaviour of the agar-galactomannan gel and the possibility of reduced costs when compared with systems containing only agar, suggest new biological and commercial applications for galactomannans. 相似文献
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穗花婆婆纳作为一种园艺观赏植物,前两年就进入国内市场,并且受到过追捧。但这两年,花友圈子里玩的人却是越来越不热衷了,大家都感觉并没有想象中那么好看,完全不像卖家秀图片上那么吸引人。到底是什么原因呢,明明是很漂亮的线性植物素材。我也是入手玩了一下才知道,是品种选择的问题,虽然花色很接近,但是品种之间的差别却是很明显,今天就来介绍一个我非常喜欢并极其满意的品种,‘皇家蜡烛’(Veronica spicata‘Royal Candles’)。我是2021年11月初购入了3棵10厘米育苗盆的小苗(图1),当时苗子的茎秆已经木质化,我想要一个爆盆的效果,所以选择3苗密植在30.5厘米口径,高25厘米的大口径花盆里。 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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