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RISS 인기검색어
- 검색키워드
- 저자 : Luis A. Valdez-Aguilar (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Effects of Ammonium and Calcium on Lisianthus Growth
Armando Hernandez-Perez,Luis A. Valdez-Aguilar,Oscar G. Villegas-Torres,Iran Alia-Tejacal,Libia I. Trejo-Tellez,Manuel de J. Sainz-Aispuro 한국원예학회 2016 Horticulture, Environment, and Biotechnology Vol.57 No.2
The objective of the present study was to determine the influence of ammonium (NH4+) (0% and 50% of total nitrogen, N) in combination with calcium (Ca) on the growth of lisianthus (Eustoma grandiflorum) in perlite cultures. Ammonium significantly improved leaf area, stem diameter, flower buds, and chlorophyll content (SPAD index) while increasing levels of Ca resulted in decreased leaf area, and chlorophyll contents. Application of NH4+ increased dry weight (DW) of stems, leaves and flowers with a reduction in root DW. In contrast, increased Ca caused a decrease in DW of all plant parts, except flowers. Decreased photosynthesis in NH4+-fed plants was associated with a decrease in magnesium (Mg) and potassium (K) uptake, and an increase in phosphorus (P) and sulfur (S) uptake. The potentially deleterious effect of this nutrient imbalance was counteracted by allocating more K and Mg to the shoot and flowers. The ability of lisianthus to shift the allocation of nutrients to sensitive plant parts may explain the tolerance of this species to high NH4+. Ammonium was associated with decreased peroxidase and catalase activities, suggesting that plants were under oxidative stress. Plants typically respond to high NH4+ nutrition by decreasing the uptake of Ca; however, in our study, increasing Ca and NH4+ resulted in increased Ca uptake, reaching toxic concentrations in shoot tissues.
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Gloria Alicia Pérez-Arias,Iran Alia-Tejacal,María Teresa Colinas-León,Luis Alonso Valdez-Aguilar,Clara Pelayo-Zaldívar 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.3
The tuberose ( Polianthes tuberosa L.) is an ornamental plant native to Mexico with fl owers that are popular due to theirdelicate beauty and intense fragrance. However, as a plant resource, it has not been well studied or commercialized. If properlymanaged and/or exploited, this cut fl ower crop has the potential to further develop and expand the Mexican ornamentalhorticultural industry. At present, few studies have focused on increasing its relatively short shelf-life, which lasts about7–10 day postharvest. As a result, this review focuses on basic aspects of the cut fl ower’s physiology, biochemistry, waterrelations, and postharvest fl oral opening. Also included are its response to cooling, the implementation of diff erent packingstrategies, the application of pulsing, preservative, and hydrating solutions, and the use of 1-methylcyclopropene as aninhibitor of ethylene action. A thorough analysis of all these technologies, their mode of action, and their infl uence on thephysiological response of cut tuberose is essential for the improvement of postharvest management strategies. It is hopedthat both handlers and distributors can benefi t from this information and be successful in prolonging the shelf-life of thisvaluable ornamental resource.
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