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Zhou Li, Yan Peng and Bingru Huang

, with TE mainly affecting shoot growth rate and water demand ( McCann and Huang, 2008 ), ABA regulating stomatal closure during drought stress ( Kholova et al., 2010 ), and CK mediating leaf senescence under heat stress ( Veerasamy et al., 2007 ). In

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Smita Barkataky, Robert C. Ebel, Kelly T. Morgan and Keri Dansereau

were conducted without adequate knowledge of soil moisture content or were conducted in dry soils that imposed drought stress. Thus, it is not known how cold acclimation changes water relations of citrus independent of soil moisture content. Citrus cold

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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

Of all the environmental stresses, drought has the greatest adverse effect on plant growth and development, leading to extensive losses in productivity ( Ciais et al., 2005 ). The susceptibility of individual plants to drought stress depends on both

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Michelle DaCosta and Bingru Huang

; Davies et al., 2002 ; Wilkinson and Davies, 2002 ; Zhang and Davies, 1989 ). Abscisic acid may also be involved in plant adaptation to drought stress by inhibiting leaf growth or transpirational area ( Alves and Setter, 2000 ; Bacon et al., 1998 ) and

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

Drought stress has been constraining agricultural production in various ways, which increasingly threatens food availability globally. Drought has been described as the effects of a sustained lack of soil moisture required for plants to properly

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Nicole L. Waterland, John J. Finer and Michelle L. Jones

postproduction decline is drought stress resulting from infrequent or inconsistent watering ( Barrett and Campbell, 2006 ). Plants respond to water deficit by closing their stomata and decreasing transpirational water loss. This drought stress response is

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Juan Carlos Melgar, Jill M. Dunlop and James P. Syvertsen

). Although winter drought stress of ‘Valencia’ sweet orange trees can effectively delay flowering so that fruitlets are not large enough to be susceptible to MH ( Melgar et al., 2010 ), there is concern that mechanical injury of fruitlets could lead to

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Qi Chai, Fang Jin, Emily Merewitz and Bingru Huang

species is critically important in areas with prolonged periods of drought. In addition, rapid recovery of damaged plant tissue and re-growth of new tissue following drought stress when water becomes available are also important in perennial grass

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Wei Hao, Rajeev Arora, Anand K. Yadav and Nirmal Joshee

Cold and drought stresses are acknowledged to be the two most dominant environmental stresses that affect the growth, productivity, and distribution of crops and horticultural plants ( Boyer, 1982 ; Levitt, 1980 ). The plasma membrane of the cell

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Xunzhong Zhang, Damai Zhou, Erik H. Ervin, Greg K. Evanylo, Derik Cataldi and Jinling Li

cells through production of excess reactive oxygen species (ROS) such as singlet oxygen ( 1 O 2 ), superoxide radical (O 2 –. ), hydrogen peroxide (H 2 O 2 ), and hydroxyl radical (OH · ) ( Zhang and Ervin, 2004 ). During drought stress, an abscisic acid