Search Results

You are looking at 21 - 30 of 977 items for :

  • All content x
Clear All
Open access

Weiping Zhong, Zhoujun Zhu, Fen Ouyang, Qi Qiu, Xiaoming Fan, and Deyi Yuan

al., 2019 ; Xiong et al., 2018 ). Its nut contains large amounts of starch, protein, and soluble sugars, and relatively low amounts of fat ( Fan et al., 2015 ). Because of its preferred taste and health benefits, chinquapin is one of the most

Full access

Shawna L. Daley, William Patrick Wechter, and Richard L. Hassell

ground using a mortar and pestle and stored at −20 °C until analyzed. Carbohydrate extraction. Glucose, sucrose, fructose, and starch were enzymatically extracted from 70 mg dried, ground tissue following the protocol of Zhao et al. (2010) . Microplate

Full access

Shawna L. Daley, Jeffrey Adelberg, and Richard L. Hassell

a starch increase of 100- and 200-fold in hypocotyls of bottle gourd and interspecific hybrid squash rootstocks, respectively, over 21 d after fatty alcohol treatment ( Daley et al., 2014 ). We hypothesize that this increase of stored energy in the

Free access

Thomas E. Marler and Nirmala Dongol

analogous to the triploid endosperm of angiosperm seeds. Studies of cycad megagametophytes may increase our understanding of evolution of the angiosperm endosperm ( Brenner et al., 2003 ). The starch content of cycad megagametophyte tissue has been exploited

Free access

X. Fan, J.P. Mattheis, M.E. Patterson, and J.K. Fellman

Total starch and amylose (AM) concentration and a starch index (SI) were determined in `Fuji' apple (Malus domestica Borkh.) fruit from weekly harvests in 1990 and 1991. As apples matured, SI scores increased and total starch and amylose content decreased. The percentage of AM in the total starch decreased as the apples matured. Because KI solutions interact efficiently only with AM, the SI is less reliable in representing total starch during later stages of `Fuji' apple maturation.

Open access

Ricardo Goenaga, Brian Irish, and Angel Marrero

sugars and starch, 500-mg fruit samples were collected at harvest time (mature green stage) and ground after lyophilization. A fruit sample subset was allowed to fully ripen (ripened yellow stage) and analyzed for sugars and starch. Soluble sugars were

Free access

K.E. Tripp, M.M. Peet, D.H. Willits, and D.M. Pharr

Two cultivars of greenhouse tomato (Lycopersicon esculentum Mill.) were grown with ambient or 1000 μl CO2/liter during Jan.-June 1987 and 1988. In both years, CO2-enrichment increased foliar deformation and foliar starch, but during the season, foliar starch levels decreased while deformation increased. `Laura' had more deformation, while `Michigan-Ohio' had higher foliar starch concentration. During an entire season, there was no significant relationship between foliar starch concentration and deformation severity. Foliar C exchange rates in the lower canopy were not affected by severity of deformation. Data from these experiments do not support the hypothesis that excess foliar starch is responsible for foliar deformation at elevated CO2.

Full access

Thomas E. Marler and Gil N. Cruz

seed infestations by A. yasumatsui on nonstructural carbohydrate relations of various C. micronesica seed tissues. We predicted free sugars and starch would decline following A. yasumatsui herbivory and the relative declines of carbohydrates in

Free access

Martin P.N. Gent

). When spinach was grown in a controlled environment and provided 1, 3, or 6 m m nitrate, nitrogen limitation at 1 m m caused a simultaneous rise in foliar levels of phosphate, sucrose, and starch ( Robinson, 1997 ). Under controlled conditions, nitrate

Full access

Thomas E. Marler

concentrations of four free sugars (the hexoses fructose and glucose, and the disaccharides sucrose and maltose) were determined using HPLC-RI (Thermo Scientific RI-150, AS3000 autosampler, P2000 pump; Thermo Scientific, Waltham, MA). Starch was quantified using