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RISS 인기검색어
- 검색키워드
- 저자 : Libia I. Trejo-Tellez (검색결과 2 건)
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Grafting improves salinity tolerance of bell pepper plants during greenhouse production
Blanca E. Orosco-Alcalá,Héctor G. Núñez-Palenius,Fidel Díaz-Serrano,Luis Pérez-Moreno,Mauricio Valencia-Posadas,Libia I. Trejo-Tellez,Nicacio Cruz-Huerta,Juan I. Valiente-Banuet 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.6
Biotic and abiotic stresses aff ect plant growth and productivity. High-salinity stress aff ects crop yield, causing fi nancialloss to growers. The use of salt-tolerant rootstocks is a strategy that has been used to reduce salt damage in crops. A studywas conducted to evaluate the eff ect of salinity-resistant rootstocks on the physiological and morphological characteristicsof bell pepper plants grown under greenhouse conditions. A factorial experiment was conducted using a completely randomizeddesign with two factors. The bell pepper ‘Viper’ cultivar was grafted on two reported salinity-tolerant rootstocks(E21R10144 and E21R10197), and non-grafted (NG) plants were used as the control. Four salinity levels were applied tothe plants (electrical conductivity treatments using NaCl of 2, 4, 6, and 8 dS m −1 ) in Steiner nutritive solution (100%). Theresponse to salinity was determined using morphological and physiological plant parameters, including fruit yield. Increasedtolerance to salinity conditions (NaCl) was observed in the ‘Viper’ bell pepper grafted on E21R10144, which allowed greaterplant height, stem diameter, leaf size, as well as fresh and dry biomass of both the roots and canopy. The impacts on plantphysiological response, including photosynthesis, stomatal conductance, transpiration, water content, stomatal density, andfoliar area, were also determined. Our results indicate that the use of the salinity-tolerant bell pepper rootstock E21R10144maintained plant homeostasis and minimized the damage caused by salts to the morphology and physiology, as well as eff ectson fruit yield; thus, it is a promising tool for the management of salt stress.
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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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