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Yanjun Guo, Terri Starman and Charles Hall

content on growth and physiological responses of two landscape roses ( Rosa hybrida L.) HortScience 49 741 745 Cai, X. Starman, T. Niu, G. Hall, C. Lombardini, L. 2012 Response of selected garden roses to drought stress HortScience 47 1050 1055 Chyliński

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J.N. Sorensen, M. Edelenbos and L. Wienberg

Yield and seed texture were studied in green peas (Pisum sativum L.) subjected to drought stress during flowering and pod filling. Field experiments were conducted with two cultivars on a sandy loam soil and drought conditions were obtained using movable rain shelters. The plants were harvested at three to five stages of maturity determined by tenderometer values and the concentration of alcohol-insoluble solids (AIS). Measured variables were related to the concentration of AIS in order to eliminate the influence of maturity when comparing between stress and nonstress conditions. Drought stress during flowering or pod filling reduced yield, but did not affect the size distribution consistently. To lessen the differences caused by variation in size distribution, all quality measurements were carried out on peas graded to 8.75 to 10.2 mm. Drought stress increased the concentration of sucrose at an AIS concentration of 140 g·kg-1. Besides the concentration of dry matter and starch the mean pea weight and testa weight did not reflect any consistency in relation to drought-stress conditions. The sensory scores for pea mealiness was not significantly increased in drought stress, and other sensory quality attributes were unaffected. In this study, the effect of drought stress on pea texture quality is weak and inconsistent when comparisons are made at the same stage of maturity. As texture quality is highly correlated to stage of maturity, the tenderometer value or AIS concentration is reliable when determining time of harvest for the production of high quality peas irrespective of drought-stress conditions during maturation.

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Georgene L. Johnson, Thomas R. Sinclair and Kevin Kenworthy

.S. 1995 Water relations of plants and soils Academic Press San Diego, CA Miller, G.L. 2000 Physiological response of bermudagrass grown in soil amendments during drought stress HortScience 35 213 216 Ray

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James W. Cross, Stacy A. Bonos, Bingru Huang and William A. Meyer

overall turf quality of cool-season grasses during summer months is commonly referred to as summer stress. Summer stress can be broken down into two major components, heat stress and drought stress ( Huang et al., 1998a ; Jiang and Huang, 2000 , 2001b

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Amir Rezazadeh, Richard L. Harkess and Guihong Bi

impact on some physiological and biochemical aspects of the water relations in plants ( Asare-Boamah et al., 1986 ; George and Nissen, 1992 ). Many studies have focused on the protective effects of PBZ against drought stress and increasing plant survival

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Da Man, Yong-Xia Bao, Lie-Bao Han and Xunzhong Zhang

Drought is a major limiting factor of turfgrass culture in many parts of the world. Drought stress suppresses growth and causes a loss of turf quality ( Carrow and Duncan, 2003 ; Zhang et al., 2009 ). Plants exhibit various physiological and

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Iro Kokkinou, Nikolaos Ntoulas, Panayiotis A. Nektarios and Dimitra Varela

findings of Munné-Bosch et al. (1999) . They reported that, drought-stressed rosemary plants grown in the field reduced their diurnal CO 2 assimilation by 80% even though the maximum efficiency of photosystem II and chlorophyll content were unaffected

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Li-Juan Zhang, Tian-Xiu Zhong, Li-Xin Xu, Lie-bao Han and Xunzhong Zhang

, January, February, and March, respectively, based on 30-year average. It appears that limited precipitation in late fall and winter may cause severe drought stress and could be a major factor causing winter-kill because the temperatures are well above

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Xiuju Bian, Emily Merewitz and Bingru Huang

. In an earlier review article, Munns (1988) pointed out that growth reduction under drought stress may also contribute to osmotic adjustment, with a 30% reduction in a relative growth rate of leaves resulting in a reduction in ψ S by 0.1 to 0.2 MPa

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Yuqi Li and Neil S. Mattson

drought stress, especially when grown in containers ( Chyliński et al., 2007 ). In response to inadequate water availability, wilting and flower drop commonly limit the postharvest and landscape longevity of ornamental plants. Therefore, drought tolerance