Effects of Methanolic Extracts from Some Native Plant Resources and Medicinal Plants on Early Seedling Growth of Rice(Oryza sativa L.)

Indiscriminate discharge of industrial effluent has become a serious problem for the agro-ecological environment in most of the areas of Bangladesh. The effects of loom-dye effluents on seed germination and early seedling growth of rice (Oryza sativa L.) were investigated by conducting an experiment in the laboratory of the Department of Agricultural Chemistry of Bangladesh Agricultural University, Mymensingh. Three types of loom-dye effluents were applied in sterilized petridishes at different loading ratios. Seven treatments (i.e., T0, T1, T2, T3, T4, T5 and T6 with 0, 5, 10, 25, 50, 75 and 100% effluent, respectively) of each effluent were used following completely randomized design (CRD) and replicated three times. Subsequently, Pb, Fe, Zn, Mn and Cr accumulation were also investigated in the harvested rice seedlings. Rice seed showed a significant difference in germination percentage with varying levels of effluent application at different days after setting of germination. The decreased seed germination rate and seedling growth of rice were observed with increased concentration of loom-dye effluents. The highest germination speed (97.8%) was obtained from control whereas the lowest germination speeds were obtained from T5 of black, and T6 of both black and violet effluents. Phytotoxic effects of loom-dye effluents on germination and radical length were extreme at 100% effluent concentration having the order of black > violet > pink. The maximum radical length (6.4 cm) and plumule length (7.5 cm) were observed with T1 of pink dye effluent whereas the minimum length of radical and plumule were obtained from T6 treatment of the effluents. The highest fresh weight (39.8 mg petridish–1), dry weight (5.7 mg petridish–1) and seedling vigor index (746.7%) were also observed from T1 of pink dye effluent. The maximum uptake of Pb, Fe, Mn and Zn was 0.48, 3.81, 0.79 and 0.13 μg g−1, respectively. The uptake of Cr was below the detectable limit. Total heavy metal accumulation in rice was in the following order: Fe>Mn>Pb>Zn>Cr. Results showed that the higher concentration of loom-dye effluent showed the higher toxic effects on different parameters of germination and early seedling growth compared with the lower effluent concentrations. J. Bangladesh Agril. Univ. 17(2): 153–160, June 2019

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Salt Tolerance Study of Six Cultivars of Rice (Oryza sativa L.) During Germination and Early Seedling Growth

Journal of Agricultural Science ◽

10.5539/jas.v5n1p250 ◽

2012 ◽

Vol 5 (1) ◽

Cited By ~ 3

Author(s):

Majeed K Abbas ◽

Ali S Ali ◽

Hameed H Hasan ◽

Radhi H Ghal

Keyword(s):

Oryza Sativa ◽

Salt Tolerance ◽

Seedling Growth ◽

Oryza Sativa L ◽

Early Seedling Growth ◽

Tolerance Study ◽

Early Seedling

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EARLY IDENTIFICATION OF SALT TOLERANT GENOTYPES OF RICE (ORYZA SATIVA L.) USING CONTROLLED DETERIORATION

Experimental Agriculture ◽

10.1017/s0014479705003030 ◽

2006 ◽

Vol 42 (1) ◽

pp. 65-77 ◽

Cited By ~ 1

Author(s):

M. Z. ALAM ◽

T. STUCHBURY ◽

ROBERT E. L. NAYLOR

Keyword(s):

Seedling Growth ◽

Seed Quality ◽

Oryza Sativa L ◽

Germination Rate ◽

Seed Vigour ◽

Early Seedling Growth ◽

Early Seedling ◽

Controlled Deterioration ◽

Rice Genotypes ◽

Initial Seed

The response of germination and early seedling growth to levels of salinity (0, 50, 100, 150, 200 and 250 mM NaCl) were examined in single seed lots of ten modern rice genotypes. Unaged and deteriorated rice seeds were germinated in rolled paper towels and in Petri dishes. Initial seed quality, final germination, germination rate and early seedling growth were assessed. The samples of the rice genotypes differed in their initial seed quality (measured in terms of Ki). The effect of deterioration varied depending upon the initial seed quality and the severity of the treatment imposed. Ageing (using the technique of controlled deterioration, CD) for up to 24 h had no effect on final germination levels. Although CD for 30 h only reduced final germination slightly, ageing for 36 or 48 h reduced it greatly. Controlled deterioration for 36 h or longer reduced the final length and the rate of extension of both the plumule and radicle. Combining information about germination in salt solution with that about seed quality enabled a distinction to be made between varieties which performed poorly because they were genetically salt-susceptible from those which germinated poorly due to poor seed quality. It is argued that the seed vigour of seed lots used in genotype evaluation should be assessed in order to avoid discarding potentially useful genotypes because of poor physiological seed quality.

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Putrescine Reduces NaCl-Induced Inhibition of Germination and Early Seedling Growth of Rice (Oryza sativa L.)

Functional Plant Biology ◽

10.1071/pp9880761 ◽

1988 ◽

Vol 15 (6) ◽

pp. 761 ◽

Cited By ~ 15

Author(s):

L Prakash ◽

G Prathapasenan

Keyword(s):

Salt Stress ◽

Water Uptake ◽

Seedling Growth ◽

Oryza Sativa L ◽

Chloride Ions ◽

Embryo Axis ◽

Nacl Solution ◽

Early Seedling Growth ◽

Early Seedling ◽

Germination And Growth

Changes induced by NaCl and putrescine during germination and early seedling growth of rice were examined for 120 h. Rates of germination and growth of embryo axis decreased when seeds were subjected to salt stress (100, 150 and 200 mM NaCl). NaCl at 150 mM concentration significantly reduced the water uptake of seeds and the rate of mobilisation of reserves. All concentrations of putrescine (0.001, 0.01, 0.1 and 1.0mM) applied exogenously to seeds increased the rate of germination and seedling growth when NaCl(150 mM) was also present and 0.01 mM putrescine gave maximum response. Addition of putrescine (0.01 mM) to NaCl solution (150 mM) reduced the net accumulation of sodium and chloride ions in seeds and increased their water uptake. Thus, putrescine can alleviate the adverse effects of NaCl during germination and early seedling growth of rice.

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