An Analysis of Leaf Growth under Osmotic Stress

Yasseen, Bassam Taha; Abu-Al-Basal, Mariam A.; Alhadi, F. A.

doi:10.3923/jps.2010.391.401

Cited by 10 publications

(11 citation statements)

References 42 publications

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“…These results are in agreement with the earlier reported findings of Mohammadi-Nejad et al (2008), Yasseen et al (2010), and Joseph and Jini (2010). In rice, plant height, total number of tillers, panicle length, grain weight per panicle, 1000-seed weight and quantity of grains decreased progressively with increase in salinity levels (Abdullah et al 2001).…”

Section: Cereal Research Communications 42 2014supporting

confidence: 83%

Path and association analysis and stress indices for salinity tolerance traits in promising rice (Oryza sativaL.) genotypes

Krishnamurthy¹,

Sharma²,

Gautam³

et al. 2014

Cereal Research Communications

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Effects of salinity on correlation, path and stress indices, yield and its components were studied in a set of 34 promising rice genotypes collected from various national and international organizations. These genotypes were evaluated in a randomized complete block design with three replications during the wet seasons (kharif) of 2009 and 2010 in normal (EC iw~1 .2 dS/m) and salinity stress (EC iw~1 0 dS/m) environments in micro plots at Central Soil Salinity Research Institute (CSSRI), Karnal, India. Grain yield per plant showed positive significant association with plant height, total tillers, productive tillers, panicle length, and biological yield per plant and harvest index under normal environment, whereas grain yield showed positive significant association with biological yield and harvest index under salinity stress. These results clearly indicate that selection of high yielding genotypes would be entirely different under normal and saline environments. The stress susceptibility index (SSI) values for grain yield ranged from 0.35 (HKR 127) to 1.55 (TR-2000-008), whereas the stress tolerance index (STI) values for grain yield ranged from 0.07 (PR 118) to 1.09 (HKR 120). The genotypes HKR 120, HKR 47 and CSR-RIL-197 exhibited higher values of stress tolerance index (STI) in salinity. Under salinity, negative and significant association was shown by SSI and grain yield in contrast to positive and significant association shown by STI and grain yield. These associations could be useful in identifying salt tolerant and sensitive high yielding genotypes. The stress susceptible and stress tolerance indices suggest that the genotypes developed for salinity tolerance could exhibit higher tolerance, adaptability and suitability. Harvest index and biological yield traits emerged as the ideal traits for improvement through selection and could be used to increase the rice productivity under saline stress environments.

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Section: Cereal Research Communications 42 2014supporting

confidence: 83%

Path and association analysis and stress indices for salinity tolerance traits in promising rice (Oryza sativaL.) genotypes

Krishnamurthy¹,

Sharma²,

Gautam³

et al. 2014

Cereal Research Communications

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“…Osmotic effects are observed rapidly after the salt application and continue during all the exhibition time determining the inhibition of the expansion and cellular division, as well as the stomata closure [3] [6] [7].…”

Section: Introductionmentioning

confidence: 99%

“…Osmotic stress reduces immediately the expansion of the roots and young leaves which determine a reduction in the size of the plant. This reduction can be attributed to a decrease in the rate of growth, including cell division and cell expansion, while the duration of growth will not be affected [7]. Osmotic phase could stay several hours or days before the Na + concentration reaches toxic levels.…”

Section: Introductionmentioning

confidence: 99%

Selection of Maize Genotypes with Tolerance to Osmotic Stress Associated with Salinity

Collado¹,

Aulicino²,

Arturi³

et al. 2016

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Thirteen different inbred lines in relation to the type of grain and life cycles were characterized by testing for osmotic stress associated with salinity. The identification of tolerant genotypes would be an effective strategy to overcome the saline stress. Osmotic stress reduces immediately the expansion of the roots and young leaves which determine a reduction in the size of the plant. A completely randomized design was adopted to test seedlings under controlled conditions of light and temperature. Two treatments were used: 0 mM NaCl (as control) and 100 mM NaCl. After 15 days of complete salinization, the seedlings were harvested and several morphological traits were measured. The morphological traits of growth were leaf growth (Ar1, Ar2, Ar3 and Ar4), dry masses of shoot and root (SDM and RDM, respectively). Also, traits associated with water economy were registered: leaf water loss (LWL) and relative water content (RWC). The morphological traits were expressed in relative terms, while the traits associated with the economy of water were expressed in absolute terms. Uni and multivariate techniques were applied to identify genotypes with divergent behaviors to osmotic stress tolerance. Also, a Tolerance Index was employed to identify superior genotypes. Four clusters were obtained after applying a Cluster Analysis and Principal Component Analysis (PCA). The genotypes were compared to each other with a test of DMS. The results obtained with different statistical techniques converged. Some variables presented a differential weight classification of genotypes. The morphological traits like RDM, SDM, Ar3, Ar4 and Ar5 were the most discriminating. Tolerance Index allowed to classify genotypes, thus SC2 and AD3 lines were that reached highest value of the index and therefore would be tolerant lines, while AF3 and LP3 had a low index and were seen as sensible.

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“…However, these ions may be sequestered in vacuoles leaving relatively low ions in the cytoplasm. Some authors [55] reported in their review that crops including cereals tolerate NaCl by excluding Na + from the transpiration stream as well as sequestration of Na + and Cl -in the vacuoles of root and leaf cells, and promote other physiological processes like faster growth rates and longer duration by maintaining high concentrations in K + despite the osmotic stress of the salt outside the roots [28,56]. Organic solutes like glycinebetaine, proline, sugars, polyols etc., may accumulate in the cytoplasm to achieve osmotic balance inside the cells, and therefore play a pivotal role in plant cytoplasmic osmotic adjustment.…”

Section: (B) Tolerance Mechanismsmentioning

confidence: 99%

“…Decreased transpiring surface: the reduction in the leaf area is a common response to osmotic stress, and could be a main reason behind the reduction in the total transpiration rate in most plants [22,27]. In fact, the reduction of leaf area at stressed growth conditions has been considered as a complex response and can be seen as an adaptation feature to reduce the water lost by transpiration process [28]. Some plant species in the Qatari flora like Ochradenus baccatus showed great reduction in the size of leaves to reduce the transpiring surface.…”

Section: Al-khormentioning

confidence: 99%

Ecophysiology of Wild Plants and Conservation Perspectives in the State of Qatar

Yasseen¹,

Al‐Thani²

2013

Agricultural Chemistry

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An Analysis of Leaf Growth under Osmotic Stress

Cited by 10 publications

References 42 publications

Path and association analysis and stress indices for salinity tolerance traits in promising rice (Oryza sativaL.) genotypes

Path and association analysis and stress indices for salinity tolerance traits in promising rice (Oryza sativaL.) genotypes

Selection of Maize Genotypes with Tolerance to Osmotic Stress Associated with Salinity

Ecophysiology of Wild Plants and Conservation Perspectives in the State of Qatar

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