Growth responses of NaCl stressed rice (Oryza sativa L.) plants germinated from seed in aseptic nutrient cultures supplemented with proline

• Published in: African journal of biotechnology Vol. 9; no. 39; pp. 6534 - 6538
• Main Authors: Ikram-Ul-Haq, Dahri, A M, Dahot, MU, Parveen, N, Ghaffar, A, Laghari, AL
• Format: Journal Article
• Language: English
• Published: 27.09.2010
• Subjects: Oryza sativa
• ISSN: 1684-5315; 1684-5315

Negative impact of salinity on plant germination is significant because of abundance of Na super(+) in culture medium, which causes growth inhibition. Effect of salinity (NaCl) in the presence of proline was assessed in rice (Oryza sativa L.) variety Khushbo-95 at seedling stage. Seeds were cultured on MS sub(0) (MS basal medium), MS sub(1) (MS sub(0) + 100 mM NaCl) and MS sub(2) (MS sub(1) + 5 mM proline) for 20 days. Seedlings and its biomass decreased in saline culture. Similarly, total protein and sugar contents also decreased, while reducing sugars and proline contents increased. These parameters were observed to be slightly adverse in cultures supplemented with proline (MS sub(2)) and NaCl (MS sub(2)). Among cultures, leaf demography (cell size) was affected significantly; this may be the reflection of accumulation of proline, Na super(+) and Cl super(-) and exclusion of K super(+) in developed rice seedlings.