Effects of Kaolin and Pinolene film-forming polymers on water relations and photosynthetic rate of tuberose (Polianthes tuberosa L.) plants under water deficit conditions.

Moftah, Ansary E.; Humaid, Al

doi:10.37855/jah.2004.v06i01.03

Cited by 8 publications

(8 citation statements)

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“…In addition, the glossiness of sprayed leaves affects light reflectance and, hence, leaf temperature. In a comparison of the effect of VG and the more light‐reflective kaolin particle film on leaf water status of tuberose ( Polianthes tuberosa L.), the latter was able to significantly reduce leaf temperature, whereas the temperature of VG‐treated leaves did not differ from that of the C (Moftah and Al‐Humaid ). No data are available for the comparison of seasonal effects of VG film on bunch temperature; our data suggest that the compound does not affect berry temperature and, again, the glossy bunch appearance is likely to play a role in such a response.…”

Section: Discussionmentioning

confidence: 99%

Manipulation of ripening via antitranspirants in cv. Barbera (Vitis vinifera L.)

Gatti

Galbignani

Garavani

et al. 2016

Australian Journal of Grape and Wine Research

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Background and Aims Accelerated berry sugar accumulation resulting in wines of excessive alcohol concentration, sub‐optimal colour and atypical flavour has become increasingly frequent in warm growing districts, a trend induced by factors that include global warming. The application of a film‐forming antitranspirant may be an effective way of reducing early sugar accumulation without affecting colour development. Methods and Results An antitranspirant emulsion was applied in 2013 and in 2014 on field‐grown cv. Barbera vines at pre‐flowering (PF), pre‐veraison (PV) and at both dates (PFPV), and compared with the unsprayed control. Post‐treatment assessment included seasonal gas exchange, yield components, growth of berry organs and must composition. Although all treatments were effective in reducing gas exchange by as much as 46% compared with that of the control, berry growth was not affected. Conversely, whereas PF slightly modified the ripening pattern, PV and PFPV markedly delayed accumulation of sugar in the warm 2013 season (−2.4 and −3.7° Brix, respectively, vs control) without detriment to colour development because the onset of anthocyanins occurred at lower TSS. In the cooler, wet 2014 season, PV and PFPV were again able to delay sugar accumulation without affecting colour development. Conclusions Pre‐veraison application of the antitranspirant alone or in combination with a PF spray proved effective in slowing sugar accumulation while avoiding concurrent delay of colour development. Significance of the Study The use of antitranspirants is a practical and flexible way of regulating the sugar : anthocyanin ratio under conditions of excessively fast ripening.

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Section: Discussionmentioning

confidence: 99%

Manipulation of ripening via antitranspirants in cv. Barbera (Vitis vinifera L.)

Gatti

Galbignani

Garavani

et al. 2016

Australian Journal of Grape and Wine Research

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“…When water is supplied adequately, plants are prodigal in their water usage because only roughly 5% of water uptake is used for their growth and development, while the remaining 95% is lost on transpiration. 86 Actively growing plants transpire each hour a weight of water equal to their fresh leaf weight in arid and semi-arid regions. This makes it necessary to find ways to use the available water economically.…”

Section: Effects Of Zeolites On the Soilmentioning

confidence: 99%

Potential and actual uses of zeolites in crop protection

Smedt

Someus²,

Spanoghe

2015

Pest. Manag. Sci.

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In this review, it is demonstrated that zeolites have a potential to be used as crop protection agents. Similarly to kaolin, zeolites can be applied as particle films against pests and diseases. Their honeycomb framework, together with their carbon dioxide sorption capacity and their heat stress reduction capacity, makes them suitable as a leaf coating product. Furthermore, their water sorption capacity and their smaller particle sizes make them effective against fungal diseases and insect pests. Finally, these properties also ensure that zeolites can act as carriers of different active substances, which makes it possible to use zeolites for slow-release applications. Based on the literature, a general overview is provided of the different basic properties of zeolites as promising products in crop protection.

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“…: clementines and tomatoes [ 18 ], grapefruit [ 31 ]) although there is controversy over its effects on gas exchanges, and mechanisms of action are not yet completely understood. Some authors reported no effect or even an increase in net assimilation (An) and stomatal conductance (g s ) [ 27 , 32 ], while others observed a reduction [ 23 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Comparing Kaolin and Pinolene to Improve Sustainable Grapevine Production during Drought

et al. 2016

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Viticulture is widely practiced in dry regions, where the grapevine is greatly exposed to water stress. Optimizing plant water use efficiency (WUE) without affecting crop yield, grape and wine quality is crucial to limiting use of water for irrigation and to significantly improving viticulture sustainability. This study examines the use in vineyards of particle film technology (engineered kaolin) and compares it to a film-forming antitranspirant (pinolene), traditionally used to limit leaf water loss, and to an untreated control. The trial was carried out under field conditions over three growing seasons, during which moderate to very severe plant water stress (down to -1.9 MPa) was measured through stem water potential. Leaf stomatal conductance (gs) and photosynthesis rate (An) were measured during the seasons and used to compute intrinsic WUE (WUEi, defined as An/gs ratio). Leaf temperature was also recorded and compared between treatments. Bunch quantity, bunch and berry weight, sugar accumulation, anthocyanin and flavonoid contents were measured. Finally, microvinifications were performed and resultant wines subjected to sensory evaluation.Results showed that the use of kaolin increased grapevine intrinsic WUE (+18% on average as compared to unsprayed vines) without affecting berry and bunch weight and quantity, or sugar level. Anthocyanin content increased (+35%) in kaolin treatment, and the wine was judged more attractive (p-value <0.05) and slightly more appreciated (p-value < 0.1) than control. Pinolene did not increase WUEi, limiting An more than gs; grapes with this treatment contained lower sugar and anthocyanin content than control, and the obtained wine was the least appreciated. This study demonstrates that particle film technology can improve vine WUEi and wine quality at the same time, while traditional antitranspirants were not as effective for these purposes. This positive effect can be used in interaction with other already-demonstrated uses of particle film technology, such as pest control and sunburn reduction, in order to achieve more sustainable vineyard management.

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Effects of Kaolin and Pinolene film-forming polymers on water relations and photosynthetic rate of tuberose (Polianthes tuberosa L.) plants under water deficit conditions.

Cited by 8 publications

References 0 publications

Manipulation of ripening via antitranspirants in cv. Barbera (Vitis vinifera L.)

Manipulation of ripening via antitranspirants in cv. Barbera (Vitis vinifera L.)

Potential and actual uses of zeolites in crop protection

Comparing Kaolin and Pinolene to Improve Sustainable Grapevine Production during Drought

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