Applications of xerophytophysiology in plant production – The potato crop improved by partial root zone drying of early season but not whole season

Xu, Hui-lian; Qin, Feifei; Xu, Qicong; Tan, Junyi; Liu, Guanming

doi:10.1016/j.scienta.2011.04.016

Cited by 28 publications

(13 citation statements)

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“…Infiltration movement induces plant hardening or internal physiological regulations caused by mild water stress. A false signal of water deficit is transduced to the internals of the cell, where it induces apparent xerophytophysiological regulation with internal adjustment from the gene level to physiological levels (Xu et al 2009a(Xu et al , 2011a(Xu et al , 2012. The plants under subsurface irrigation have been shown to maintain a high leaf turgor potential and a retention of a high symplastic water fraction that help plants to improve morphological strengthening, such as a thicker epidermis and more wax deposits on leaves and cuticle.…”

Section: Subsurface Irrigation or Infiltration Movementmentioning

confidence: 99%

“…Many factors influence the maintenance of leaf water potential under RDI; this depends on the intensity of water deficit applied (Liu et al 2006a), crop growth stage (Li et al 2010b), and duration of deficit (Xu et al 2011a). In potato (Solanum tuberosum L), partial root-zone irrigation applied during the early growth period improved the fractional ratio of water in the cell symplasm to water in apoplasm and lowered the osmotic potential and relative water content at the point of incipient plasmolysis (Xu et al 2011a).…”

Section: Leaf Water Contentmentioning

confidence: 99%

“…In potato (Solanum tuberosum L), partial root-zone irrigation applied during the early growth period improved the fractional ratio of water in the cell symplasm to water in apoplasm and lowered the osmotic potential and relative water content at the point of incipient plasmolysis (Xu et al 2011a). The early-season partial root-zone irrigation resulted in better use of soil water reserves through improved root to shoot ratio , increased root biomass (Wang et al 2012b), and enhanced root activity (Yang et al 2012a).…”

Section: Leaf Water Contentmentioning

confidence: 99%

“…These substances may serve to decrease leaf osmotic potential, allowing leaves to tolerate suboptimal water levels. Leaf turgor maintenance caused by osmotic adjustment through solute accumulation is found in plants under subsurface irrigation (Xu et al 2009a(Xu et al , 2011a.…”

Section: Non-enzymatic Substancesmentioning

confidence: 99%

“…Promote higher osmotic adjustment particularly when mild water stress is applied in early growth stages (Yactayo et al 2013); 3. Allow the development of drought hardiness by partial drought stimulations (Xu et al 2011a), where multiple cellular tolerance pathways operate in a coordinated manner in drought-tolerant plants (Parvathi et al 2013); 4. Optimize stomatal control over gas exchange (Wang et al 2010a), improving the ratio of photosynthesis to transpiration or to stomatal conductance of CO 2 (Cui et al 2009a); 5.…”

Section: Mechanisms Involved In Improved Water Use Efficiencymentioning

confidence: 99%

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Regulated deficit irrigation for crop production under drought stress. A review

Chai

Gan

Zhao

et al. 2015

Agron. Sustain. Dev.

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451

234

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Agriculture consumes more than two thirds of the total freshwater of the planet. This issue causes substantial conflict in freshwater allocation between agriculture and other economic sectors. Regulated deficit irrigation (RDI) is key technology because it helps to improve water use efficiency. Nonetheless, there is a lack of understanding of the mechanisms with which plants respond to RDI. In particular, little is known about how RDI might increase crop production while reducing the amount of irrigation water in real-world agriculture. In this review, we found that RDI is largely implemented through three approaches: (1) growth stage-based deficit irrigation, (2) partial root-zone irrigation, and (3) subsurface dripper irrigation. Among these, partial root-zone irrigation is the most popular and effective because many field crops and some woody crops can save irrigation water up to 20 to 30 % without or with a minimal impact on crop yield. Improved water use efficiency with RDI is mainly due to the following: (1) enhanced guard cell signal transduction network that decreases transpiration water loss, (2) optimized stomatal control that improves the photosynthesis to transpiration ratio, and (3) decreased evaporative surface areas with partial root-zone irrigation that reduces soil evaporation. The mechanisms involved in the plant response to RDI-induced water stress include the morphological traits, e.g., increased root to shoot ratio and improved nutrient uptake and recovery; physiological traits, e.g., stomatal closure, decreased leaf respiration, and maintained photosynthesis; and biochemical traits, e.g., increased signaling molecules and enhanced antioxidation enzymatic activity.

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Section: Subsurface Irrigation or Infiltration Movementmentioning

confidence: 99%