Negative Feedback Regulation of Transport in Cells. The Maintenance of Turgor, Volume and Nutrient Supply

Cram, W. J.

doi:10.1007/978-3-642-66227-0_11

Cited by 147 publications

(95 citation statements)

References 152 publications

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“…Studies indicated that proline, which occurs widely in higher plants, assimilates in larger amounts in salt stressed plants [39,74,75]. Proline accumulation in rice has also been reported by [76] suggesting its active roles in osmotic adjustment, shielding the enzymes and membranes, also providing energy and nitrogen for utilization during exposure to salinity [77,78].…”

Section: Response At the Biochemical Levelmentioning

confidence: 84%

Response of Rice under Salinity Stress: A Review Update

Ghosh¹,

Ali²,

Gantait³

2016

J Rice Res

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Salinity has been a key abiotic constraint devastating crop production worldwide. Attempts in understanding salt tolerance mechanisms has revealed several key enzymes and altered biochemical pathways inferring resistance to crop plants against salt stress. The past decades have witnessed extensive research in development of salt tolerant cultivars via conventional means, improvised by modern era molecular tools and techniques. Rice (Oryza sativa L) is the staple food crop across several countries worldwide. Being a glycophyte by nature, its growth is severely imparted in presence of excess salt. Rice is susceptible to salinity specifically at the early vegetative and later reproductive stages and the response of the crop to excessive salt toxicity at biochemical and molecular level as well as physiological level is well studied and documented. An understanding of the specific response of rice to ion accumulation at the toxic level can aid in identifying the key factors responsible for retarded growth and limited production of rice with the future scope of mitigating the same. The present review summarizes the differential responses of rice, in particular, to salt toxicity enumerating the detailed morphological, physiological, biochemical and molecular changes occurring in the plant. An attempt to explain salinity tolerance and its future scope and implications in screening for salt tolerance has also been elucidated in the present study.

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Section: Response At the Biochemical Levelmentioning

confidence: 84%

Response of Rice under Salinity Stress: A Review Update

Ghosh¹,

Ali²,

Gantait³

2016

J Rice Res

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“…The magnitude of increase in K and N accumulation have been major factors for increasing DW production and plant height because both are component of many metabolically important compounds and play important role in physiological and biological functions (Marschner 2002). More than 50 enzymes are activated by K ' which plays a vital role in salt tolerance due to its penetration into the cell sap and causing protoplasmic T1 T2 T3 T4 T5 65 DAS F Genotypes changes leading to increased water retention capacity of water stressed plants (Cram 1976;Bhandal and Malik 1988). The observed enhanced value for MDA.…”

Section: Resultsmentioning

confidence: 99%

Morphological and physio-biochemical characterization ofBrassica junceaL. Czern. & Coss. genotypes under salt stress

Siddiqui

Mohammad

Khan

2009

Journal of Plant Interactions

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Soil salinity is one of the major factors responsible for the low productivity of crop plants and has become an increasing threat for agriculture. In this context, the selection of tolerant genotype/s may be one of the remedies. Keeping this in view, the effect of NaCl (0Á120 mM) stress on shoot length (SL) plant , stomatal conductance (g s ), net photosynthetic rate (P N ), total chlorophyll (Chl) content, malondialdehyde (MDA) content, sensitivity rate index (SRI), leafnitrogen (N), potassium (K) and sodium (Na) content, leaf-K/Na ratio, nitrate reductase (NR: EC.1.6.6.1) and ATP-sulphurylase (ATP-S: EC.2.7.7.4) activities and proline (Pro) and glycinebetaine (GB) content of ten genotypes of Brassica juncea L. was studied at 55 and 65 days after sowing (DAS). NaCl treatments decreased all the above parameters, except Pro, GB, MDA, Na and SRI at both stages. Salt stress resulted in accumulation of Pro and GB, in all genotypes. The magnitude of increase in both osmolytes (Pro and GB) was higher in genotype G 8 than the other genotypes. Salt stress increased MDA and Na content while it decreased Chl, N and K content and K/Na ratio, Chl content, NR and ATP-S activities in all genotypes. But the magnitude of increase in MDA and Na content and decrease in SL plant(1 , A leaf (1 , LAI, P N , g s , Chl content and NR and ATP-S activities in genotype G 8 was more than that of other genotypes. These results suggest that the salt-tolerant genotype may have better osmotic adjustment and protection from free radicals by increasing the accumulation of Pro and GB content with overproduction of N and K and higher K/Na, NR and ATP-S activities under salinity stress.

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“…The plant sciences have lagged well behind except in the physical aspects of the plant environment and community physiology. We find expanding interest in mathematical formulations of specific biological processes, with major attention given to such subjects as leaf growth and phyllotaxy (35,69,124,128), carrier kinetics (20), photosynthesis (15, 17, 48, 119), and catenary diffusion sequences (84). 'rhe biomathematical analysis of physiological problems has been given extended treatments by Nobel (84), Riggs (99), and Thomley (117).…”

Section: An Assessment: Sense or Nonsensementioning

confidence: 99%