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Chao-Yi Lin and Der-Ming Yeh

-deficient conditions with healthy appearance ( Yeh et al., 2000 ). Irregular yellowish areas on the old leaves have been observed on Guzmania lingulata (L.) Mez. ‘Cherry’. These affected plants tend to produce incurved leaves after storage. Yellow spots on old

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Alicia Rihn, Hayk Khachatryan, Benjamin Campbell, Charles Hall, and Bridget Behe

( S. wallisii Regel), and bromeliad ( G. lingulata ) represented different types of indoor foliage plants that are relatively common and potentially recognizable to a wide range of consumers. Price points included $10.98, $12.98, and $14.98 per plant

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C.Y. Kuo and D.M. Yeh

Guzmania lingulata (L.) Mez. `Cherry' were grown in coco chips and fertigated with half-strength Hoagland solution containing various concentrations of boric acid. Excessive boron induced changes in growth, relative chlorophyll content, and leaf anatomy were investigated. Plants treated with 5 mg·L–1 or higher boric acid concentration had reduced SPAD-502 readings and Fv/Fm values and increased leaf necrosis in the lower leaves. Boron was distributed unevenly within a leaf, with the maximum concentration in the leaf tip. Increased necrotic length and new leaves with necrosis were evident where average whole leaf boron concentration was higher than 170 μg·g–1 on dry weight basis. More leaf growth and higher transpiration or stomatal conductance were recorded in plants under 40% (average 676 μmol·m–2·s–1 PPF at noon) than 76% (average 270 μmol·m–2·s–1 PPF at noon) shade. Excessive boron was not found to affect epidermal cells or water storage tissue, but caused browning and shriveling of the chlorenchyma cells.

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Richard C. Beeson Jr. and Jianjun Chen

), implying that the roots are capable of taking up water and nutrients. Gas exchange and plant growth of Guzmania lingulata (L.) Mez. fertigated through roots were comparable with those fertigated through tank ( Silva et al., 2017 ). With current commercial

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Enoc Barrera-Aguilar, Luis A. Valdez-Aguilar, Ana M. Castillo-González, Andrew D. Cartmill, Donita L. Cartmill, Edilberto Avitia-García, and Luis Ibarra-Jímenez

cell enlargement and leaf expansion ( Fricke et al., 1994 ; Fricke and Flowers, 1998 ; Shabala, 2003 ; Shabala et al., 2000 ). An increase in leaf size in Guzmania lingulata (L.) Mez ( Yi Lin and Ming Yeh, 2008 ), Olea europea L. ( Karimi et al