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D. Gerasopoulos and D.G. Richardson

Mature `Anjou' pears (Pyrus communis L.) continuously stored at 20 °C or -1 °C before transfer to 20 °C exhibited differences in the sequence of ripening events up to 100 days. Pears continuously held at 20 °C showed little change in ripening characteristics (chlorophyll, firmness, titratable acidity) for 14 to 28 days, then these characteristics decreased at a daily rate of 1.4% thereafter. A 40% increase in soluble polyuronides paralleled the firmness loss, while ACC did not exceed 0.5 nmol·g-1 until the 84th day, and internal ethylene did not exceed 0.2 μL·L-1 until after 90 days, whereas ACC oxidase activity (and total protein) peaked after 63 days. `Anjou' pears stored at -1 °C showed no changes in chlorophyll, firmness, protein, or total polyuronides for at least 84 d. Despite essentially no change in firmness during -1 °C storage, there was a slow but steady increase (≈15 %) in soluble polyuronides. ACC oxidase activity, expressed as ethylene production, rose to 71 nL·g-1·h-1 and the ACC content increased to almost 1.0 nmol·g-1 by the 84th day. Internal ethylene slowly increased and levelled to 1 μL·L-1 by the 56th day. Satisfaction of a chilling requirement thus appears to favor the development of ethylene synthesis capacity, which on transfer from cold storage to higher temperatures results in enough internal ethylene to rapidly drive the associated ripening mechanisms. Fruit for which the chilling requirement (≥70 days at -1 °C) was met softened in response to accelerated internal ethylene production on transfer to 20 °C for 7 days. However, pears that were not chilled or partially chilled did not sustain the increased ACC levels or ACC oxidase activity. Chemical name used: 1-aminocyclopropane-1-carboxylate (ACC).

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Carl E. Sams, Dilip R. Panthee, Craig S. Charron, Dean A. Kopsell, and Joshua S. Yuan

). Therefore, Se may represent a unique environmental stress for studying responses in S-metabolic pathways within plants of the Brassicaceae. Glucosinolate and carotenoid accumulations in plants are heavily influenced by genetic and environmental factors

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Xinyi Chang, Junli Sun, Lianling Liu, Wang He, and Baolong Zhao

important strategy for the development of jujube tree production and cultivation. Plants can overcome salt stress by changing the regulation of gene expression and hence that of the relevant physiological and biochemical metabolic pathways. Atienza et al

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Zhijun Zhang, Huaifeng Liu, Junli Sun, Songlin Yu, Wang He, Tianyuan Li, and Zhao Baolong

mainly focused on the growth and development of vines and only partially on fruit quality. However, no studies have been conducted on the effects of various rootstocks on the chemical composition of grape seeds or related metabolic processes and pathways

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Kevin M. Folta and Sofia D. Carvalho

the phenylpropanoid pathway and the latter a potent agent of photomorphogenic behaviors. Ultraviolet-B irradiation also induces networks associated with stress, wounding, and defense ( Brosche and Strid, 2003 ; Kilian et al., 2007 ). Work in cucumber

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Denise V. Duclos and Thomas Björkman

network of five flowering pathways that involve response to daylength, vernalization, carbohydrates, gibberellins, and an age-related autonomous pathway. However, the five pathways ultimately converge on the floral integrator genes leafy ( LFY

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He Huang, Yuting Liu, Ya Pu, Mi Zhang, and Silan Dai

relatively controlled by cascades of molecular networks, and such a significant number of pathways and genes is associated with the process of salt tolerance that it is a profoundly complex process ( Deinlein et al., 2014 ). In higher plants, the salt stress

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Suping Zhou, Roger J. Sauvé, Zong Liu, Sasikiran Reddy, Sarabjit Bhatti, Simon D. Hucko, Tara Fish, and Theodore W. Thannhauser

isoelectric point value. Functional pathways affected by salt stress in leaf tissues Proteins identified in leaves were divided into three groups: salt-induced ( Table 1 ), salt-suppressed group ( Table 2 ), and proteins identified in multiple isoforms

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Steven J. Damon and Michael J. Havey

, 1970 ; Eigenbrode and Espelie, 1995 ; Städler, 1986 ; Thibout et al., 1982 ). The biosynthetic pathway for epicuticular waxes has been studied in several plants ( Kunst and Samuels, 2003 ). De novo fatty acid synthesis occurs in the plastid

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Eric W. Kerschen, Caleb Garten, Kimberly A. Williams, and Melanie M. Derby

offices or residences. This study quantifies evapotranspiration rates from two common indoor plant species with different photosynthetic pathways in a controlled environmental chamber. The research objectives include 1) quantification of evaporation rates