Sites and Mechanisms for the Inhibition of Photosynthesis by Water Stress
13
Citation
11
Reference
10
Related Paper
Keywords:
Water Stress
Degree (music)
Cite
Citations (10)
• Whether photosynthesis is limited during water stress and recovery because of diffusive or biochemical factors is still open to debate, and apparent contradictions appear when various studies on species with different growth forms are compared. • Ten Mediterranean species, representing different growth forms, were subjected to different levels of water stress, the most severe followed by rewatering. A quantitative limitation analysis was applied to estimate the effects of water stress on stomatal (SL), mesophyll conductance (MCL) and biochemical limitations (BL). • Results confirmed a general pattern of photosynthetic response to water stress among C3 plants when stomatal conductance (gs) is used as a reference parameter. As gs values decreased from a maximum to approx. 0.05 mol H2O m−2 s−1, the total photosynthetic limitation rose from 0 to approx. 70%, and this was caused by a progressive increase of both SL and MCL limitations, while BL remained negligible. When lower values of gs were achieved (total photosynthetic limitation increased from 70 to 100%), the contribution of SL declined, while MCL still increased and BL contributed significantly (20–50%) to the total limitation. • Photosynthetic recovery of severely stressed plants after rewatering showed a dominant role of MCL, irrespective of the degree of photosynthesis recovery.
Stomatal Conductance
Water Stress
Cite
Citations (561)
Water Stress
Cite
Citations (13)
The advances in some aspects related to the Bambusoideae photosynthetic physiological indexes and some Gramineae plants photosynthesis in adaptation to water stress in recent years were summarized.And problems existing in the research of the Bambusoideae photosynthetic physiological were pointed out,meanwhile some suggestions on more better studying of photosynthesis in adaptation to water stress were given.
Water Stress
Drought stress
C4 Photosynthesis
Environmental stress
Cite
Citations (0)
This experiment was carried out on the potted plants of maize. Three different maize varieties (Shendan 10, Yedan13 and Danyu13) were chosen as experimental materials. This paper compared the effects of different water stress intensity on leaf photosynthesis of different drought -resistant maize hybrids. The results indicated that the photosynthetic rate of maize leaf under water stress went down with the increasing of water stress, and the photosynthetic rate decreased obviously under severe water stress.
Water Stress
Drought stress
Water Use Efficiency
Cite
Citations (9)
The influences of water stress on citrus photosynthesis charateristic and cell ultra-structure were systematically studied by using P.trifoliata(L)Raf.and C.sinensis S.as materials.The results showed that the water stress significantly affected net photosynthetic rate(Pn),the transpiration rate(Tr) and stoma cond(Gc) and damaged root,leaf and chloroplast ultra-structure.The damaged degree of ultra-structure was increased by water stress.Under water stress,photosynthesis turned out to be restrained as a result of the cooperation of stoma and non-stoma mechanism;when photosynthesis decreased sharply and the cells were damaged seriously,it was the critical time to irrigate in citrus production.
Water Stress
Stoma (medicine)
Cite
Citations (1)
Photosynthetic inducement was done in one year old,normally growing avocado tree,the effects of water stress on intensity of photosynthesis and relative dynamic changes of photosynthetic pigments was determined under 500 μmol·m -2 ·s -1 .The results indicated:Its photosynthesis dropped clearly with stress intensified.Carotene dropped first,then did chlorophyll a,but chlorphyll b content increased constantly.H 2O 2 increased greatly then it had a decline trend.
Water Stress
Photosynthetic pigment
Cite
Citations (0)
Water Stress
Drought stress
Carbon fibers
Cite
Citations (15)
Chloroplasts have been isolated from 4- to 6-day-old corn (Zea mays) leaves capable of assimilating 45 micromoles CO(2) per milligram chlorophyll per hour. The effects of various factors such as inorganic phosphate, reducing agents, inhibitors, intermediates of the photosynthetic carbon reduction cycle, organic acids, and oxygen on the photosynthetic rate and on the distribution of (14)C within the products by these chloroplasts were determined. The photosynthetic carbon metabolism of the corn plastids appeared to be similar to that already observed in spinach and pea chloroplasts. It was concluded that the corn plastids can fix CO(2) at meaningful rates via the photosynthetic carbon reduction cycle of Calvin without the operation of a cycle involving the C-4 compounds, malate and aspartate.
Cite
Citations (35)
Abstract The effects of conventional hot‐air dehydration, dehydro‐freezing and freeze‐dehydration on colour and rehydration of apples, apricots, and peaches were investigated. The freeze‐dehydration process minimised colour changes and promoted retention of the original fruit structure. The rehydration rates of freeze‐dehydrated fruits were more rapid than those associated with other dehydration processes studied.
Cite
Citations (5)