Some physiological and photosynthetic characters of rice × sorghum and rice × wheat hybrids |
| |
| Authors: | N K Srivastava S Yoshida |
| |
| Institution: | (1) Department of Plant Physiology, International Rice Research Institute, P.O. Box 933, Manila, Philippines;(2) Present address: Department of Plant Physiology and Biochemistry, Central Institute of Medicinal and Aromatic Plants, P.B. No. 1, P.O. RSM Nagar, 226016 Lucknow, India |
| |
| Abstract: | Summary Some photosynthetic characters as-leaf anatomy, leaf photosynthetic rate and CO2 compensation pointdistinguishing C3 and C4 plants and physiological characters as leaf area ratio, nitrogen content, leaf stem ratio and total shoot-to-root and deep root-to-shoot ratios have been studied in rice × sorghum and rice × wheat hybrids. Rice × sorghum 1. has lower values of photosynthetic rate, leaf nitrogen, total root and deep root-to-shoot ratio and CO2 compensation point as of rice parent where as, rice × sorghym 2. is superior in all these characters. Both hybrids lack kranz anatomy. Though both rice × sorghum hybrids show characters of C3 rice plant but rice × sorghum 2. has improved drought tolerance and leaf characters in relation to yield. Rice × wheat hybrid have higher assimilatory area and higher total root-to-shoot ratio. Grains of rice × wheat hybrids are identical to rice grain. However, as grains of rice × wheat hybrid does not contain seed coat, it could be exploited as novel rice germplasm after improvement.Abbreviations T
CO2 compensation point
- T21
CO2 compensation point at 21% O2
- T2
CO2 compensation point at 2% O2
- dR/sR
deep Root-to-shoot Ratio
- LAR
Leaf Area Ratio
- CER
photosynthetic rate
- TR/SR
Total Root-to-Shoot Ratio |
| |
| Keywords: | Oryza sativa Sorghum bicolor Triticum aestivum C3– C4 characters growth analysis rice × sorghum rice × wheat hybrids root studies |
| 本文献已被 SpringerLink 等数据库收录！ |
|
