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

during drought stress. Several studies have indicated that proline content increases during drought stress, and proline accumulation is associated with improvement in drought tolerance in tall fescue and other plants ( Seki et al., 2007 ; Zhang et al

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Mason T. MacDonald, Rajasekaran R. Lada, A. Robin Robinson, and Jeff Hoyle

) have also found that Bioprotect® 2 (a conifer-derived phenolic compound; discovered by Dr. Lada, NSAC, Truro, Nova Scotia, Canada) and glycinebetaine (a quaternary ammonium compound) effectively promote drought tolerance in carrots. Another compound of

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Kevin Fort, Joaquin Fraga, Daniele Grossi, and M. Andrew Walker

). Rootstocks have since been developed for other traits that include nematode resistance, lime tolerance, salt tolerance, tolerance of saturated soil, and influence on scion vigor and fruit maturity ( Galet, 1998 ; Pongrácz, 1983 ). Drought tolerance can also

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Yun-Peng Zhong, Zhi Li, Dan-Feng Bai, Xiu-Juan Qi, Jin-Yong Chen, Cui-Guo Wei, Miao-Miao Lin, and Jin-Bao Fang

few decades in response to increased temperatures of between 1.4 and 5.8 °C by the end of the 21st century ( Salinger, 2005 ). Plants rapidly adjust their structure and metabolism to withstand drought stress. Based on the mechanism of drought tolerance

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Erin Alvarez, S.M. Scheiber, Richard C. Beeson Jr, and David R. Sandrock

( Tardieu and Simonneau, 1998 ). Although E. spectabilis is a native plant, its higher tolerance to moderate water stress than M. sinensis does not necessarily imply that native grasses outperform nonnatives in drought situations. Water use and drought

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Haiying Zhang, Guoyi Gong, Shaogui Guo, Yi Ren, Yong Xu, and Kai-Shu Ling

watermelon germplasm with drought tolerance properties is needed for the development of drought-tolerant watermelon varieties. The National Engineering Research Center for Vegetables (NERCV) and the beijing academy of Agriculture and Forestry Science

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Nanqing Liu, Yixin Shen, and Bingru Huang

(e.g., malate), as well as inorganic ions (e.g., potassium and calcium) ( Chaves et al., 2003 ). Improvement in drought tolerance has been positively correlated with OA in leaves of many plant species, including perennial grasses used as turfgrasses

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Waltram Ravelombola, Ainong Shi, Jun Qin, Yuejin Weng, Gehendra Bhattarai, Bazgha Zia, Wei Zhou, and Beiquan Mou

). Evidence of drought conditions has been reported in these areas ( Escalante et al., 2016 ), which could limit cowpea production; however, little has been done toward advancing breeding programs for drought tolerance in cowpea compared with other legumes

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Yu Cui, Jinsheng Wang, Xingchun Wang, and Yiwei Jiang

availability is limited and extensive irrigation is not practical. Therefore, improvement of drought tolerance of turf and forage grasses is becoming increasingly important to minimize effects of drought on the plants and to enhance water conservation

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Kemin Su, Justin Q. Moss, Guolong Zhang, Dennis L. Martin, and Yanqi Wu

turfgrass that support the popular hypothesis that dehydrin accumulation is positively correlated with dehydration tolerance. Hu et al. (2010) reported that accumulation of 31- and 40-kDa dehydrins may contribute to drought tolerance in bermudagrass