Spano G, Di Fonzo N, Perrotta C, Platani C, Ronga G, Lawlor D W, Napier J A, Shewry P R
Experimental Institute of Crop Research, S.S 16 km 675-71100 Foggia, Italy.
J Exp Bot. 2003 May;54(386):1415-20. doi: 10.1093/jxb/erg150.
Four mutants with delayed leaf senescence were selected from seed of durum wheat mutagenized with ethylmethane sulphonate. Changes in net photosynthetic rate, efficiency of photosystem II and chlorophyll concentration during the maturation and senescence of the flag leaves of both mutant and parental plants were determined under glasshouse conditions. The four mutant lines maintained photosynthetic competence for longer than the parental line and are therefore functionally 'stay green'. The mutant lines also had higher seed weights and grain yields per plant than the parental line.
从用甲基磺酸乙酯诱变的硬粒小麦种子中筛选出四个叶片衰老延迟的突变体。在温室条件下，测定了突变体和亲本植株旗叶成熟和衰老过程中净光合速率、光系统II效率和叶绿素浓度的变化。这四个突变系保持光合能力的时间比亲本系更长，因此在功能上是“持绿型”。突变系的单株种子重量和籽粒产量也高于亲本系。
