Dergiler / EurAsian Journal of BioSciences (elektronik) / 2009 / Sayı: 3
Growth and carbon partitioning of two genotypes of bean (Phaseolus vulgaris) grown with low phosphorus availability
- Sayı
- 2009 · Sayı: 3
- Sayfa
- 17–24
- DOI
- —
Özet
Adi fasulyenin (Phaseolus vulgaris) uretimi genellikle dusuk toprak fosforu (P) nedeniyle kisitlanir. Fasulye genotipleri, P etkinligi, kuru madde uretimi ve dusuk P kosullarinda ayrisim konusunda farklilik gosterirler. Bu calismada iki fasulye genotipi kullanildi; sinirsiz buyume ozelligi ve kucuk tohumlari olan cv. Carioca (CNF 0554) ile sinirli buyume ozelligi ve buyuk tohumlari olan cv. Prince (ticari olarak mevcut). Bitkiler, ya sinirlandirici olmayan veya dusuk P icerikli cozelti kulturunde yetistirildi ve kuru madde (KM) uretimi, KM ayrisimi ve buyume parametrelerini olcmek icin iki kez hasat edildi. Sinirli genotip, baslangictaki tohum buyuklugu nedeniyle, sinirsiz genotipe oranla daha fazla KM uretti. Dusuk P mevcudiyeti, kok kuru agirligini artirdi, yaprak ve govde kuru agirligini azaltti. Toplam KM'de degisim gozlenmedi. KM ayrisimi, KM uretimi ile ayni yolu izledi. Carioca, govdede daha az, kokte daha fazla KM biriktirir. Dusuk P mevcudiyeti, yaprak alani (YA), yaprak alan orani (YAO) ve spesifik yaprak alanini (SYA) azaltti. Dusuk P, buyumeyi genotiplerde farkli etkiledi. Carioca'da, nispi buyume oranlari (NBO) ve net asimilasyon oranlarinda (NAO) azalma gozlendi, ancak Prince'de herhangi bir degisiklik yoktu. Fasulye genotiplerinde, farkli buyume ozellikleri acisindan P'averilen tepkide genetik bir farklilik mevcuttur.
Abstract
Production of the common bean (Phaseolus vulgaris) is often limited by the low availability of soil phosphorus (P). Bean genotypes differ in their P efficiency, dry matter production and partitioning under low P availability. Two genotypes of bean were used in this study cv. Carioca (CNF 0554) with indeterminate growth habit (GH) and small seeds and cv. Prince (commercially available) with a determinate GH and large seeds. Plants were grown in a solution culture with either a non-limiting or low P supply and harvested at two occasions to measure dry matter production (DM), DM partitioning, and growth parameters. The determinate genotype produced a higher DM than the indeterminate genotype, due to the larger seeds. At low P supply increased the root dry weight and decreased the leaf and stem dry weight. No effect was detected on the total DM. The DM partitioning follows the same pattern as DM production. Carioca invests less dry matter in the stem, and more dry matter in the root. Low P availability also reduced the leaf area (LA), leaf area ratio (LAR) and specific leaf area (SLA). Growth was affected differently between the genotypes by low P. There was a reduction in relative growth rates (RGR) and net assimilation rates (NAR) for Carioca, but no effect was found in Prince. A genetic variation for P response exists in bean genotypes with different growth habits.