News Update on Seed Germination Research: Jan – 2020

News Update on Seed Germination Research: Jan – 2020

News Update on Seed Germination Research: Jan – 2020

Seed Germination and Vigor

Germination vigor is driven by the power of the plant embryo, embedded within the seed, to resume its metabolic activity during a coordinated and sequential manner. Studies using “-omics” approaches support the finding that a main contributor of seed germination success is that the quality of the messenger RNAs stored during embryo maturation on the mother plant. additionally , proteostasis and DNA integrity play a serious role within the germination phenotype. due to its pivotal role in cell metabolism and its close relationships with hormone signaling pathways regulating seed germination, the sulfur aminoalkanoic acid metabolism pathway represents a key biochemical determinant of the commitment of the seed to initiate its development toward germination. This review highlights that germination vigor depends on multiple biochemical and molecular variables. Their characterization is predicted to deliver new markers of seed quality which will be utilized in breeding programs and/or in biotechnological approaches to enhance crop yields. [1]

Seed Germination and Seed-Bank Ecology in Halophytes

Halophytes have evolved characteristics to regulate to the stressful conditions in their native habitats by means of variety of various adaptive responses at the germination stage of development. the extent of expression of salt tolerance by plants at the germination stage cannot always be correlated with tolerance at later stages of development. The interaction between thermoperiod and salinity was investigated for the succulent-perennial desert shrub Zygophyllum qatarense. the event of somatic seed polymorphism is of selective advantage to plants, because it permits plants to reply on to changing environmental conditions by directing their reproductive allocation into different seed morphs. Josselyn and Perez determined that seeds of S. marina also made up a substantial portion of the seed bank on a California coastal salt marsh. Many highly salt-tolerant species don’t germinate at seawater levels of salinity which increases in salinity inhibit their rate of germination, delay the beginning of germination, and cause a decrease in total germination. [2]

Gibberellin Biosynthesis and Response during Arabidopsis Seed Germination

The hormone-mediated control of plant growth and development involves both synthesis and response. Previous studies have shown that gibberellin (GA) plays an important role in Arabidopsis seed germination. to find out how GA stimulates seed germination, we performed comprehensive analyses of GA biosynthesis and response using gas chromatography–mass spectrometry and oligonucleotide-based DNA microarray analysis. additionally , spatial correlations between GA biosynthesis and response were assessed by in place hybridization. We identified variety of transcripts, the abundance of which is modulated upon exposure to exogenous GA. A subset of those GA-regulated genes was expressed in accordance with a rise in endogenous active GA levels, which occurs just before radicle emergence. [3]

Seed Priming with Melatonin Improves the Seed Germination of Waxy Maize under Chilling Stress via Promoting the Antioxidant System and Starch Metabolism

Chilling stress is one among the main abiotic stresses affecting waxy maize plant growth. Melatonin (MT) is in a position to enhance tolerance to abiotic stress in plants. to research the consequences of seed priming with MT on tolerance to chilling stress in waxy maize, the seed germination characteristics and physiological parameters were tested with varied MT concentrations (0, 50, 100 µM) and treatment times (12, 24 h) at ambient (25 °C) and chilling (13 °C) temperature. MT primed seeds significantly enhanced the germination potential (by 20.29% and 50.71%, respectively), germination rate (by 20.88% and 33.72%), and increased the radicle length (by 90.73% and 217.14%), hypocotyl length (by 60.28% and 136.14%), root length (by 74.59% and 108.70%), and seed vigor index (46.13%, 63.81%), compared with the non-priming seeds under chilling stress. [4]

On Improving Seed Germination and Seedling Growth in Rice under Minimal Soil Salinity

Aims: it had been assumed that two- way approach i.e. nutrient-priming with potassium salt of the seeds and afterward ammonium sulphate application could also be binary beneficial for growth of rice besides evidencing genetic variability under salt stress

Study Design: The experiment was laid call at Complete Randomized Design with three replications.

Place and Duration of Study: The study was conducted in laboratory and glass house of Soil Salinity Research Programme of natural resource Research Institute at National Agricultural research Centre, Islamabad, Pakistan during the amount from May to August, 2016.

Methodology: Seeds of cultivated rice (cv. KS-282 and BAS 385) were primed with saltpeter . within the second phase of the study, the primed seeds were raised during a minimal saline soil with ammonium sulphate nutrition gradually up to 150 mg Kg-1. [5]

Reference

[1] Rajjou, L., Duval, M., Gallardo, K., Catusse, J., Bally, J., Job, C. and Job, D., 2012. Seed germination and vigor. Annual review of plant biology, 63, (Web Link)

[2] Ungar, I.A., 2017. Seed germination and seed-bank ecology in halophytes. In Seed development and germination (pp. 599-628). Routledge. (Web Link)

[3] Ogawa, M., Hanada, A., Yamauchi, Y., Kuwahara, A., Kamiya, Y. and Yamaguchi, S., 2003. Gibberellin biosynthesis and response during Arabidopsis seed germination. The Plant Cell, 15(7), (Web Link)

[4] Seed Priming with Melatonin Improves the Seed Germination of Waxy Maize under Chilling Stress via Promoting the Antioxidant System and Starch Metabolism
Qingjun Cao, Gang Li, Zhengguo Cui, Fentuan Yang, Xiaoli Jiang, Lamine Diallo & Fanli Kong
Scientific Reports volume 9, (Web Link)

[5] uz-Zaman, B.-, Ali, A., Ali Mahmood, I., Suhaib, M., Arshad Ullah, M. and Ishaq, M. (2017) “On Improving Seed Germination and Seedling Growth in Rice under Minimal Soil Salinity”, Asian Research Journal of Agriculture, 4(1), (Web Link)

Editor 251News

leave a comment

Create Account



Log In Your Account